Thirteen is someone who has no qualms with saying what's on her mind and with doing what she wants to do no matter what others think about it. She chose to be a RAD exchange student not because of any interest in bringing "harmony to the three worlds," but because she was simply curious, as she told Lord Diavolo. Her goal in choosing to spend time at RAD is to have some fun and try out some of her trademark traps, of which she's very proud of and happy to show off. Thirteen is a reaper that prefers to keep to her own company, and told MC in the chat Alone Is Better that she prefers going out alone, that way she doesn't have to worry about anyone but herself. She is someone that has definite opinions on things, and is more than willing to argue with those who think differently. She lives in a mystical cave in the Devildom.

You were hanging out in Gehanna with Satan and Leviathan's guards kidnapped you, bringing you to Hades.

You went to play music from a jukebox from a bar you were at but this girl beat you to it.