curiously I can see the servants who fall in love with ritsuka in the normal FGO taking two routes:
route a) hikaru genji plan, taking the risk of confronting two mother manipulative goddesses, murderous gramps (and yes I include Iri in the risk, because you dont fck with her grandsons if you want to live), psychotically protective aunts, possible brothers, sisters, aunts, uncles and recently added overprotective family, a pet ball of fur that has the potential to become the primate murder and the ultimate beast, the chaldea unlimited cook, user of the skill "harem" Ex rank that traces time-space and the supreme breast Emiya.
route b) move from romantic love to family, transforming into onesan's and onisan's maybe uncles or aunts and receiving the benefits of being taken care of by mama Emiya, also avoiding the risks of the route a
by the way when Fou appers from the chest of mash I think he will suffer to became the familiar pet but surely he will enjoys be pet, feed and tke care for little ritsu-chan.
Also I wonder how the other beast reaccion to little ritsuka...
Tiamat maybe try to adopted (kidnap) her
Kiara surely trolling Emiya introducing hersef, as a former lover, better if she is taking caring of a little ritsuka male version
Goetia, I not sure maybe he have 72 voices talking of what the fck do, or maybe try a hikaru genji plan for himself, the only think I know is if he does some stupid romani surely kick his ass, I dont know how but you dont fuck with Romani"motherfucker SalomonKingofmagic" little cake apreciation friend
And aa a last think, becasue all the comics of the original ritsuka have a crush in romani, how do you thinks her famili reacts if the little ritsu says that she will become Dr.Romance future wife?