リージェン

Ligene is a mysterious girl that appeared from nowhere one day in front of Koutarou. She is the resident joker and always having fun, if a tad on the irresponsible side personality-wise. More to the point, she might not be the most suitable for the role of TP (time patroller).

Her real name is a mouthful so we make do with "Lin.”
She's got a style that comes across as a bit bizarre, but a closer look and it's clear that she is one beautiful girl.
One day before summer break, Lin bumps into Koutarou while in a strange outfit.
That is when the time traveling begins.