Medea will definitely adopt her whether or not being adopted by her is at all a good thing given her mythology is anyone’s guess.

Ngl I can imagine her turning back up to the temple with Homura like Souichirou-sama can we adopt her please?? And him all ‘...fine.’

But yes just trying to work out the best way for them to meet- could be that she tries to steal something from Souichirou and Caster gets involved and gets attached. Or Caster finds her lurking at the temple and decides to try and work out how she got there.

Did you want to play from them meeting or go straight to heart to heart times? And is she likely to know Caster’s legend?

Medea needs all the love honestly.