How would the Li's react after finding out that Model!Mc has gerascophobia and strict on staying 'pretty' due to childhood trauma?
I think for Pierrot this fear will hit him closer to home due to his mom being a model... so he'd be a bit intense.
he'd grab their hands and say "You're beautiful, the most gorgeous person I've met! I wish you could see yourself from my eyes. Please... you're already perfect, no matter what happens."
Expect Pierrot to drown MC with compliments.
Rosaura would in a way understand it (you know, women tend to have higher expectations to remain pretty all their life.) and even if she wouldn't be AS intense as Pierrot she'd help slowly, she wouldn't be as overwhelming. She'd also open up and share her own experiences with that stress.
Sandrone probably doesn't... really care for concepts of pretty or beautiful. I do think he falls on the asexual spectrum(? But he wouldn't try to rationalize with fear (since sometimes that doesn't even work.), he'd listen and say "... I wish I could take all the stress away from you. but you can rest with me. I already find you perfect,"
Columbina, unlike Rosaura... she probably doesn't really care much for expectations on her, but she DOES know and has seen how that hurts.
She'd probably be the most chill one and compliment VERY specific things "You know, I really like the shape of your eyelashes... hah, you think it's weird? It might be a little but everything about you is pretty to me... even if you're angry at me."
She'd try to make MC laugh
Arlecchino... would also have a bit of understanding in a weird way. Arlecchino doesn't see himself as beautiful, but it would hurt him to see MC, the most beautiful person in his life think they have to ALWAYS be pretty.
He'd probably paint a portrait of MC and say "...I know it's... well, fuck... give me a second... I know you feel like you have to be pretty all the time, but... you already are. Even when you don't think you are. I don't... paint people I don't find pretty... crap, am I making any sense?" (He's trying)