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Name: Yuki Nagato

Age: 4 (Appears to be 17)

Gender: Female

Canon

Universe of Origin: The Melancholy of Haruhi Suzumiya

Personality: Yuki was created with limited social abilities, something she claims will affect her until she ceases functioning. She rarely speaks, often ignoring attempts to communicate using gestures like nods, staring or pointing, or giving one word replies. Sometimes she provides a complex explanation using mostly scientific terms to explain even the simplest of things, or announces events which others might not notice.

Yuki's voice is usually a monotone, and her facial expressions rarely change, and any such changes are minor. Careful observation is required to discern any emotional responses. As a result, Yuki frequently acts "shy". When interacting with people she doesn't know very well, she frequently stares at the floor and either gives very short responses or says nothing at all, even if angry. Yuki has shown a poor understanding of emotions, especially her own.  When pushed to describe her own emotions, she usually says nothing or gives an understated answer, such as "relatively" enjoying books and being "a little bit" disappointed at being rejected. She rarely expresses opinions, and these are usually based on those of the Data Overmind.

Yuki is very fond of reading and later developed computer programming as a hobby. She has occasionally demonstrated interest in human activities, such as watching fireworks and reciting poetry. Yuki appears to have a low opinion of herself, and is also a closet Otaku.

Abilities/Weapons: 

Yuki has superhuman strength, agility, stamina, is immune to pain, alcohol, and all human disease. She also has very keen eyesight, which allows her to determine a number of factors about biological and data-based organisms, such as heat. Yuki's memory is flawless, and it can't be erased as long as she stays connected to the Overmind. She can manipulate both physical and conceptual things. Most of her spells involve some kind of incantation, but they are spoken at an incredible speed. This also allows her to create a separate space known as a Data Jurisdiction, where she has free control of the space. Due to her connection with the Overmind, she can dissolve all forms of data, as well as contact others electronically from her brain. Her glasses can be used to inject people with anything, though its really only useful for nanomachines. 

Backstory: Yuki was created three years prior to meeting Kyon and Haruhi, with the purpose of observing humanity and its ability to evolve in intelligence, and more importantly, Haruhi Suzumiya and the data flare that she created around that time. Her only real goal, even in the multiverse, is to observe. 

Faction: Factionless.