And here is something of a whole art set I did for Cobatsart back in 2020: a few tarot cards featuring his troll characters!
This is the fool, featuring Solus when he was just a child.
The Fool, represented by Lil' Solus, on a journey to determine his fate.
Which path he follows determines which troll sibling will raise him (Even though, in Canon, Gretel is where it ultimately leads.)