Board Thread:General Discussion/@comment-82.43.138.194-20140707202022/@comment-6697950-20141212193000

Sachi and Yui look similar and we thus have plenty of people who try to prove that Yui based her appearance on Sachi even though she had an appearance before Sachi even met Kirito. "Look like" doesn't mean "related". Japanese main characters quite often have similarities.