Talk:High School Story: Class Act, Book 1 Choices/@comment-35206165-20181107140710/@comment-35568572-20181107141312

Nope. Unfortunately, it's set to belong to your MC's opposite sex. This means that they are going to be male if your MC is female and female if your MC is male. Their appearance is also dependent on your MC's appearance.

Further reading: https://choices-stories-you-play.wikia.com/wiki/User_blog:Andisimon/HSS_Class_Act_-_Your_Twin_Sibling_and_Default_Jordan

The page about him/her is incomplete in providing information. That's the only reason I shared a blog post.