Honestly, I don't know! I just picked Bienie, decided to stick with them, and as such, didn't give them a story or anything else so that they could remain as true to me as possible. For me, giving a sona their own backstory makes me see them more as their own characters than as "me", but it works differently for different people! It also helps to let a sona "grow" with you and make changes when needed. It's all about finding what is exactly right for you, and sometimes you won't like your sona. It's a lengthy process, but don't give up!

Also, yes! Bienie has been in relationships with four characters, who were all sonas of my partners at the time. For the reasons stated above, I don't ship them with people I'm not dating, because that would make them feel less like me! So all of their partners are representations of actual relationships in my life.