Same with Flan and Macaron. And why Fenrir ended up in Jail. Jarn's actual mom escaped because current Ordin freed her because it made the trandparent past Jarn happy. His father chased after her and found Fenrir with her body or smth. But in the past, he didn't have transparent past Jarn, he only met Jarn after he sat on his face. That's why he's so attracted to Jarn's butt in the current life.

Basically, Jarn turned back time (with Fenrir's help) and everyone's slowly gaining their memories. Long-haired Jarn is past Jarn. Past Ordin was bad and obsessed with past Jarn, but current Ordin, after seeing the drawing, it might have stirred feeling in him from his past self and so was kinds kind in this lifetime.
Basically, it wasn't 100% turned back because there were ripples that changed how each character met each other. Trigger for remembering past apparently is seeing their their most trigerring memory from the past in the current.
Basically I was right in being #TeamBeast!!!!
In other words, imagine that instead of just MC, everyone is gaining their memories. The only Q now is if Jarn's actual mom (the aunt) was originally a monster too or not.