Yuuki had a tendency to land herself in the most unusual and often bizarre situations, completely by chance. This is often the result of her ambitious and adventurous nature, she can never simply leave something unresolved or half done, and has to give anything worth her time 100% of her energy and attention. Want to race up a hill? She will go up and down it five times just to prove she can. Want to have a staring contest? I'm sure she would let her eyes dry out entirely before giving in. Yuuki spends most of her time training in her various hobbies, and has led a relatively simple lifestyle. She is still considered very young by the species standards, as she is only 34 years old.

     Unlike a lot of lockettes, Yuuki is pretty fond of humans and gets along with them perfectly. She never lived through the war, nor has she ever been faced with reason to personally doubt them, as a lot of her closest friends and allies are humans. Sometimes this in itself can lead to conflict with other Lockettes, but generally Yuuki does her best to stay on everyones good side. Another thing that will often land Yuuki in peoples bad books is her clumsiness. She is completely accident-prone and has no trouble falling over absolutely nothing. In spite of all of this, she is actually still incredibly good at aiming. Her primary weapon is a small bow that she summons to shoot heart-tipped bows at her targets, these will almost never miss their mark. In addition to this she is incredibly good at sports that require a good aim or sense of direction. She completely fails when it comes to track and field, or long jumps, but softball and throwing games are all right up her alley.