Yusai

Yusai (友才,) is a Japanese samurai who helped train Andy in the past and she later becomes a member of Under. In the 101st loop, she is recruited to the Union

Personality
Yusai fell for Andy whilst training him and said he'd be a perfect partner to continue her families legacy and make an heir for the future, Andy rejected this offer and Yusai was very sad when he left.

Autumn Arc
She is first seen in Akira Kuno's flashback to discover if Andy was real, recalling the summer of that year was when he would come to Japan, to practice the quick draw sword technique from her due to her Negator ability making it impossible for her to ever do so herself. After Andy managed to master all of her family's arts in one year, she tearfully begs him to stay, in the hopes that they could continue her family's legacy, as well as having fallen for him. Andy agreed to it, but only if she could outlive him. Since this was impossible, he left Yusai in tears as he walked away, both over the loss of perhaps the only person who could save her family's bloodline and the first person she fell in love with, all while Akira notes that "negators are always suffering".

Union Arc
She is mentioned as one of the Negators Fuuko wants to save to build the "ultimate Union".

Negator War Arc
She is first seen seriously malnourished thanks to keeping an unspecified UMA in place with her newly-awakened Undraw for a week. She is saved just before she can pass out thanks to Fuuko using Unluck to shock the UMA, allowing the both of them to escape. At the Union base, Yusai is fed and is told the whole story about Negators and God, but wonders how she can help since she can't draw her sword anymore. Even so, she then agrees to help save Billy, Tella, and Creed from their tragedies as payment. She starts by helping Fuuko locate Kusuga Village, rescuing Isshin the 12th from the UMA that would kill Haruka's father.

Powers & Abilities
Undraw: Yusai is able to negate the action of drawing, or pulling something out from something else. This prevents things like sheathed swords or holstered guns from being drawn while in her vicinity. This also applies to more mundane things, like attempting to pull a pair of chopsticks out of your mouth. Interestingly, this ability also affects Yusai herself, preventing her from drawing her katana in battle.

Master Swordsmanship: Yusai is a great sword master having taught Andy how to fight with swords when she was younger and even though she is older her sword skill remains impressive. Her skill is so great that she can perform her special sword techniques with her blade sheathed.

Equipment
Flaming Sword: A sword imbued with the power of UMA Burn.

Etymology

 * The name Yusai means "friend, companion, pal" (友) (yu) and "talent, genius, years old, cubic shaku" (才) (sai).

Trivia

 * Yusai ranked 28th in the First Popularity Poll and 28th in the Third Popularity Poll.