Board Thread:Wiki/@comment-30049797-20160924003216/@comment-32149097-20170901034014

mikasa was still never adopted. When using it in a sentence it does not use adopted. And from the definition you got from "引き取る" (Hikitoru?) also means "to adopt." Adoption doesn't always mean to legally adopt someone. Also weblio is a official Japanese dictionary and my Japanese teacher recommended this and jisho.