I think it depends on the context of the person, like if you’re going with the logic that Moon serves as a self-insert or whatever, it’s fine. This is why I didn’t like that GF kept forcing a canon age, because it fucks up the MC being a blank slate to self-insert into. In the other games (besides gen 1 maybe?), the age is never disclosed, allowing for you to become the character in the game. In SM/USUM, they constantly shove it down your throat that you have a cannon age, and really that makes me upset. Just keep it ambiguous like before.