She occupies Berezin's Manor as her living space and AEON Archival Office as her workplace, however she can be found in neither, as she situates herself in a location out of Colt's reach for safety purposes. Thus, she is considered one of the leaders by the Eternalists, and they reverently regard her as such. Julianna is one of the individuals called the Visionaries, having been imbued with the Anomaly's energy, prior to the First Day. Julianna is enthralled to live infinitely for the sole purpose of being able to read as many books as she deem fit, and her passion is yet to hinder. She is the only person on the island to have excelled at the numerous amount of tests, created by Egor Serling and Wenjie Evans as a part of her admission, and she is a certified bookworm, having hauled her abundant library along with her to Blackreef. Julianna Blake is the only daughter to Lila Blake and Colt Vahn, having been conceived on the island prior to the latter's disappearance in the Anomaly in 1938.

Not much is known about Julianna prior to her admission into AEON as its archivist-she has lived with her mother, Lila Blake before the latter's untimely death and has been educated as a historian. Julianna in Official Protect the Loop Trailer Biography Background She is very knowledgeable, keeping many details of her and Colt's lives, as well as other Visionaries' in her mind to carefully lay out her game rules to Colt, as he progresses through the discoveries. Julianna has her priorities set straight and follows through with them efficiently, although she is not one to refuse herself some fun: she outright claims to have killed other Visionaries multiple times and further proves it by commenting 'Haven't done that in a while' when killing Harriet Morse during her own game mode. She is pretty confident in her own chances, as she doesn't shy away from the direct conversation and even a duel when Colt learns what she deems enough to evaluate the Loop's potential. She appears to be detached from the events unfolding as the player progresses through the leads, however she is restless and cannot wait until Colt comes to her to talk face to face. Julianna is known to be able to hold her liquor and having an iron spine, and she is an exemplar bookworm, having her own library at her mansion, as well as filling the entirety of available surfaces with magazines and book yet to be read. She strongly believes in the Loop's potential and exercises it to her own amusement, with little regard to the rest of the Visionaries or Eternalists, unless the Loop is threatened. Julianna never shies away from excessive violence, and she outright states to be enjoying the hunt and the game between her and the player (Colt), and her motives are rather self-explanatory. She is simultaneously caring and mocking, trusting and betraying, but she never fails to deliver a snarky commentary to Colt, whom she constantly tries to convince to not break the Loop-and any method to accomplish that is plausible. Julianna displays a rather unique personality: 'one moment she’s tenderly holding your hand, and the next, she’s plunging a machete through your spine'. It mainly consists of a khaki green oversized nylon bomber jacket with cotton satin inner padding and a painted back logo, a mustard-colored natural silk satin sleeveless top shirt with a stylized aircraft brooch, light blue slim tapered 12oz denim pants, white sneakers with elastic straps and dark brown gloves with 2 white fingers on her left glove. She has a standard appearance for cut scenes and in-game profiling- The Archivist skin. Julianna has voluminous curly dark brown hair, which she usually ties with a mustard-colored natural silk satin headband, and she likes to wear a pair of black and white painted metal round earrings. She is relatively tall, lean and athletic in a way that allows her to be agile to successfully hunt down Colt Vahn. Julianna wears many faces, thanks to her unique Slab-the Masquerade. Being the only remembering Visionary, Julianna believes that her life's purpose, as well as duty, is to 'protect the cycle'-and for that, she must eliminate the threat to the loop in the face of Colt.

However, unlike the rest of the inhabitants, she seems to have avoided the amnesiac effect of the the anomaly. She appears at the start of the game, seemingly caught in an endless timeloop within Blackreef along with Colt Vahn, the game's protagonist. Julianna is the archivist and the new head of security of the AEON Program.

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