#ki-bo

Akamatsu is the easiest fit for a generic amalgamation of the Muses. Music and motivation are her bread and butter.

Amami can be the amalgamation of the river gods, brothers of the Oceanids. Links with his gimmicks of navigation and having a lot of sisters.

Saihara can work with Ma'at. He's the detective who finds the truth, but struggles to make a judgment based on it. Ma'at is the truth goddess whose feather is used to measure the truth, but Anubis is the one doing the judgment.

Hoshi is the toughest choice. Sakamoto Ryouma (Pan-Human) is there as his namesake's namesake, but Ryouma Hoshi doesn't have enough of the samurai imagery used for Ryouma Echizen, so I'd rather pick something more specific to his story. I guess he can be another Jaguarman. His tragedy begins with him refusing to play a rigged game, and that spirit of fairness is something Tezcatlipoca will respect and sympathize with. The cat theme is a good bonus.

Toujou has immediate angel vibes, so I'll arbitrarily pick Gabriel, but really, any of them works.

Angie is not someone I feel comfortable associating with real-life religions. I know it was a bad idea when the official loc did it. So I'll have Angie summoned as herself, with the divinity of her own god.

Chabashira is a temple-raised Buddhist and a character marked by childishness, ignorance, compassion, the process of building new ideas for a new school, and celebration of emotional expression, so I think the best Buddha pick for her would be Maitreya. Kind of a stretch, but hers really has to be a Buddha no matter what, so the options aren't exactly too open.

Shinguuji is a very pick for Michizane. God of study and knowledge who provides a link to every possible Shinto god, and to horror stories about the ghosts of the dead. What else could I ask for?

Yumeno can have Hecate. There are quite a few gods of magic, but Hecate is the only one I remember being only that and nothing else.

Iruma is an inventor who only takes real pride on her work when it's an item that allows people to do tasks while asleep, so Hypnos is a pretty easy pick. There aren't many other sleep gods out there.

Gonta... Eh, I guess Khepri? Out of the insect gods, he feels the most wholly benevolent and devoted to being useful to everyone. Scarab Mode Gonta would probably feel fulfilled rolling the sun.

Ouma as Loki is completely self-explanatory.

Momota can have Okeanos. It's a spaceship, and its ties to Iskandar tie neatly to Momota as a similar brand of uplifting leader.

Harukawa gets Huitzilopochtli. Out of all death gods out there, he and Kishimojin are the only ones related specifically to the death of children, while both already came out in Fate/ technically as themselves, Huitzilopochtli gets more Pseudo-Servant leeway since Tenochtitlan is allowed to also steal his name.

Ki-bo is the one I'll give a weird Servant that doesn't come out normally, instead of the Divine Spirit. Ki-bo is modeled in the shape of the average human and this normality is very significant to him, so I find Adam a better fit for him than any god.