1

you have been freinds with kid or who you call cos for a while...right after you lost your twin sister who disappeared.

you had been living on the streets for your entire life with your sister after your parents had died...but after she randomly disappeared.you snuck into the junkyard and got caught by cos and then you became friends.
one day while you were hanging out in the "secret lair/base" cos brought in some stones and made them into rings

(Just so you know this isn't really a super romantic thing since cos is a child )