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(※This character is from Fate/stay night.)
Rin Tohsaka is a girl with an attractive face and figure, who is accomplished in both literature and the military arts, and who has high skills in magic. ...However, this is a "feigned friendliness", and with a motto of "If you're going to do it, do it well," it's clear she has an aggressive personality.
For the sake of battle, she endeavors to always be "cool-headed", there are times when she shows a kinder side, such as when she's unable to abandon a troubled Shirou Emiya.
There are many sets which portray her and her summon, Archer. I especially recommend the straps!
Also, many figures are sold with outfits such as swimsuits and kimono, although these are not as prevalent as saber.
In Doujinshi, she's often shown with her guardian, Kirei Kotomine, and her father, Tokiomi Tohsaka, as well as other characters from her past. This is because even though she appears very adult, she's also quite cute, and was even more cute as a child, causing an increase in such stories in Japan!
As a child, she often showed up in Fate/Zero, so please check that out as well!