A personal headcanon of mine is that Lea was an orphan who got tossed around family to family all his life due to him being something of a problem child until Isa’s family took him in (and they gave him a snazzy scarf for his first birthday in the family)
Years later he gets to learn that he can build a family, not have to have the one he was born to that left him behind. Probably why he’s so desperate to keep the ones he was part of together.
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