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"The Hateno Ancient Tech Lab is where we Sheikah researchers study the scientific contributions of our ancestors. We aim to apply our findings to the world of today and to unravel the mystery of the shrines and Divine Beasts."
Symin

Hateno Ancient Tech Lab is a location in The Legend of Zelda: Breath of the Wild. It is located in Hateno Village in the East Necluda region of Hyrule.

Spoiler warning: Plot or ending details follow.

Background & History

"The Hateno Ancient Tech Lab has one unshakable objective: To develop technology to effectively seal Ganon, the infinite evil that has plagued Hyrule throughout time. We believe this can be achieved by studying and improving upon the creations of those who came before us."
— Symin

Hateno Ancient Tech Lab is where Purah the director and her assistant Symin developed and experiment with Sheikah technology, specifically runes.

According to Purah, the Hateno Ancient Tech Lab was built and funded one hundred years ago by some bigwig at Hyrule Castle shortly before the fall of Hyrule during the Great Calamity. After the Great Calamity and Princess Zelda sealed herself and Ganon in Hyrule Castle, Purah, her younger sister Impa, and subordinate Robbie decide to split up in order to survive long enough to help Link when he awoke from the Slumber of Restoration. After drawing straws, Purah was selected to go to the Hateno Ancient Tech Lab in Hateno Village, though she convinced Robbie to escort her before he left to set up a lab in the old Akkala Lighthouse. She ended up parting ways with him at Fort Hateno while Robbie was distracted by the sight of the defeated Guardians left behind as a result of Link's battle with the Guardians that left him injured.

After taking residence in the Hateno Ancient Tech Lab at the age of 30, Purah began researching on how to expand the functionality of the Sheikah Sensor, which resulted in the development of Sheikah Sensor+ which was finished when Purah was 80 years old. During that time she also discovered the existence of other Runes such as Cryonis Rune, Stasis Rune, and Remote Bombs while reading through some ancient texts. This presumably allowed her to develop upgrades such as the Stasis Rune+ and Remote Bomb+. She was also able to add what she discovered about Stasis and Cryonis to the Sheikah Slate Manual she eventually wrote.

During her time at the lab, Purah gained a reputation among the local villagers for her eccentric personality and habit of carrying a Torch lit with Blue Flame she acquired from the Ancient Furnace near Zelkoa Pond within the village. While most of the villagers are unaware of the nature of her research or what she used the blue flame for, most are shown to respect her and care about her well being despite some disliking her personality. At some point, Impa sent Nanna to study under Purah, though she later returned to Kakariko Village and started a family. Impa later sent Jerrin to study under Purah as well though Jerrin was eventually sent to assist the elderly Robbie at the Akkala Ancient Tech Lab whom Jerrin would later married. To replace Jerrin, Impa sent Symin to assist the elderly Purah, who due to her strong dislike of the effects of aging, began working on an experimental reverse aging rune, which she had Symin test on her when she was 120. At first the rune appeared to be successful, as it reversed her age by 70 years, reverting to the 50 year old woman. Despite her success, Purah notes in her diary that she feared that she might wake up in the body of an infant, as it had reversed her age far more than she expected. However she was pleased when her body reversed back 20 years, restoring her to a 30 year old woman, the same age she was when she started working on the Sheikah Sensor+ and was renewed with youthful energy she hadn't felt in 90 years. She soon reverted back 10 years to a 20 year old woman and writes in her diary she hadn't felt as good in at least a century. It also caused her to recall the Great Calamity and its aftermath. However things started to take a turn for the worse when her body and mind reverted back to that of a teenager, causing her overact to sight of a pimple on her face and became irritated when Symin insisted on doing a blood test for her. She also began to worry her Guidance Stone would soon run out of power when she noted her Furnace's flame was growing weaker. Finally her body reverted to that of a six year old, causing her to get frustrated and began to wonder when Link would awaken, to the point she even wanted to go and kick him awake, though she doubted that Symin would help her do that, so she began working on a way to reverse the reverse-aging process. Fortunately, she discovered that he condition had stabilized and she remained in the body of a six year old and had finished beta version of a age boosting rune. However unfortunately, she was unable to add this feature to the Sheikah Slate she had made, as her Guidance Stone had stopped working as her furnace's fire had gone out. Symin tried to relight it but proved to be to clumsy for the task and a rain storm put out his torch, so Purah went out to help and do it herself, but was spotted by a village girl (implied to be Karin), which caused the Hateno Village's children to begin spying on her lab in hopes of catching a glimpse of the mysterious Sheikah girl, unaware that it was the lab's director. Eventually at some point she received a letter from Robbie and Jerrin, in which Robbie revealed he wanted to send his and Jerrin's now grown up son Granté to study under her after she had written a letter to them about how useless Symin was. As a result, Purah was forced to continue her research with primitive gas lamps. Embarrassed by her condition, Purah sent a letter telling Robbie not to send anyone, causing him and Jerrin to wonder way. Then one day she noticed Sheikah Towers popping up from the ground like wild mushrooms and noted that the Shrines began glowing. She soon put these events together when she meet the person she had been waiting for 100 years to appear: the revived Hylian Champion Link.

Reunion with Link

During the Quest "Locked Mementos", Link is told by Impa to speak to the director of the Hateno Ancient Tech Lab about restoring the missing and corrupted components of the Sheikah Slate. When Link first enters the Hateno Ancient Tech Lab, he is made to believe that Symin is the director, though Symin reveals the now six year old Purah to be the director, who was playing a practical joke on the amnestic Link. Purah then properly introduces herself and reveals that thanks to her being a top-tier researcher, she was able to connect Link appearance with the appearance of the Sheikah Tower and power being restored to the Shrines. She also reveals that the Sheikah Slate is an device developed by the ancient Sheikah scientists specifically to help Link conquer, Calamity Ganon and that that is the reason why the Sheikah Towers and Shrines are working as Link meets all the prerequisites as he is the Hero Chosen by the Master Sword from one hundred years prior. It is also reveals that the Sheikah Slate Link is holding was same one used by Princess Zelda one hundred years prior. Link shows her the Sheikah Slate and she is surprised to see Link has added Remote Bombs, Magnesis Rune, Cryonis Rune, and Stasis Rune to the Sheikah Slate, which he had obtained from the four Shrines on the Great Plateau thanks to the guidance of the spirit of the Last King of Hyrule, Rhoam Bosphoramus Hyrule disguised at the Old Man. She is even more surprised to find the Slate's original runes from when Princess Zelda owned it, the Camera Rune, Hyrule Compendium, and Album are missing or corrupted. She reveals that her lab's Guidance Stone should be able to restore the missing component and fix its corrupt data, but first he must relight her labs furnace to restore power to it. Purah is pleased after Link relights the flame and restores power to be beloved Guidance Stone which she affectionately dotes on. After removing the Guidance Stone's locking mechanism, she allows Link to use it to restore the Camera Rune, Hyrule Compendium, and Album to the Sheikah Slate. She then asks Link to use the Camera Rune to take her picture and show it to her. As she examines the Sheikah Slate's album he notices old pictures showing locations as they appeared before the Great Calamity, which Purah suspects were taken by Princess Zelda hundred years prior. She surmises that Link was probably with Zelda when she took those pictures as he was the Captain of Zelda's Imperial Guard and her personal bodyguard back when the picture were taken. She theorizes that these might be key to restoring Link's memory and suggests he talk to her sister Impa to learn more as she was closer to Princess Zelda. She also tells Link that in exchange for Ancient Materials, she will upgrade his runes. She also tells him to seek out her former subordinate Robbie at the Akkala Ancient Tech Lab where he has been working to aid Link as well.

Relighting Purah's Furnace also restores power to her lab's Travel Gate and adds it to the Sheikah Slate, allowing Link to use it as a fast travel point. In addition to the Torch Link can find inside the Hateno Ancient Tech Lab, he can find a Farmer's Pitchfork and Farming Hoe outside the lab itself which he can pick up and equip. These weapons will occasionally respawn when Link returns to the area.

Related Side Quests

Upgrades

In the Side Quest, "Slated for Upgrades" Purah explains more about the upgrades she promised. In exchange for ancient materials obtained from defeated Guardians or by searching broken Guardian remains, Purah can upgrade Link's Sheikah Sensor, Stasis Rune, and Remote Bombs. This quest is completed once Link upgrades all three runes (the Sheikah Sensor is identified as a basic rune according to Symin's Sheikah Sensor Notes).

Upgrade Function Materials
Sheikah Sensor+ This upgrade links the Sheikah Sensor with the Hyrule Compendium allowing Link to use it to search for things recorded in the Hyrule Compendium. Obtaining the this upgrade also causes Symin to ask to see it which leads to the Side Quest "Sunshroom Sensing" which acts a tutorial for the Sheikah Slate+. Ancient Screws (x3)
Remote Bomb+ This upgrade increases strength and blast radius of Link's Remote Bombs and causes reload time to decrease allowing his Remote Bombs to reload much faster. Ancient Shafts (x3)
Stasis Rune+ This upgrade allows Link to use Stasis to freeze enemies in addition to objects opening a new combat application to the Stasis Rune. Ancient Cores (x3)

Robbie's Research

If Link talks to Purah about Robbie, she will explain that he is her subordinate and that he has been doing research at the Akkala Ancient Tech Lab. She tells him to take ancient materials to Robbie and he will help Link leading to the Side Quest "Robbie's Research". This quest can be taken at any time, though requires Link to travel to Deep Akkala which can be dangerous early on depending on how Link reaches it. Once Link makes it to the Akkala Ancient Tech Lab, like in "Locked Mementos" Link must relight the Akkala Ancient Tech Lab's Furnace to power Robbie's modified Guidance Stone, the Ancient Oven Cherry which will allow him to purchase Ancient Soldier Gear. Robbie also rewards Link with three free Ancient Arrows for restoring power to Cherry.

Sheikah Sensor+ Tutorial

After upgrading the Sheikah Sensor, Symin will ask to see it which results in him deciding to have Link test it out by taking a picture of a Sunshroom growing behind the Hateno Ancient Tech Lab then show it to Symin resulting in the "Sunshroom Sensing" side quest. This adds the Sunshroom to entry to the Hyrule Compendium, allowing Link to use the Sheikah Sensor to search for three Sunshrooms in Retsam Forest and bring them back to Symin, who rewards Link with three Hearty Truffles.

Diary, Notes, and Manuals

Breath of the Wild Hateno Ancient Tec Lab (Purah's Room) Purah's Diary (Hateno Village)

Link reading Purah's Diary in Purah's Room

When Link first meets Purah, she tells him to read her diary in her room to find out how she ended up in a six year old body, though near the end she seems to change her mind and warns him not to read it. Link can find Purah's Diary in her room on the top floor of the Hateno Ancient Tech Lab's tower. If Link reads Purah's Diary he can learn the story of her reverse ageing rune research which lead to her current condition. However if he talks to Purah after it, she will ask him if he read it. Regardless of his answer she will reveal she is aware that he read it, though will commend him for his honesty if he tells the truth. She then seemingly takes Link's Sheikah Slate and uses her Guidance Stone to erase all its data and rune. However when Link looks at the Sheikah Slate he discovers his runes are all still their and learns that Purah had once again played a prank on him, even mimicking her Guidance Stone's voice to fool him. This also explains Purah's conflicting behavior as she tells him to read it, but then tells him not to. In addition to Purah's Diary, Link can find the Camera Manual and Sheikah Slate Manual on the desk Purah stands next to. Link can also find the Sheikah Sensor Notes on a desk near its author, Symin.

Picture Shop

Eventually Symin will offer to sell Link pictures to add certain entries to the Hyrule Compendium allowing Link to gain pictures of objects and enemies he might have missed.

Spoiler warning: Spoilers end here.

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