itch.io

I wouldn't think Eirik is an RO, mainly because he's the PC's (first) cousin, so it'd be incest and the author most likely doesn't condone it

Every character under main cast is an RO except the brothers. Darius/Daria is too.

I think the letters of each route in the prologue was basically the equivalent to '1,2,3'. They probably used letters to seperate each route in paths the player can take, not to choose which romance route to go for (especially since the player is only the age of 6 during the prologue)