interesting! (as a disclaimer, i have zero experience with DnD, so this is going to be wildly amateurish.)
Ophelia: Half-Elf sorcerer, specializes in celestial arcane magic
Penelope: Elven Cleric
Kinesa: Air Genasi Rogue

I can see Norrie as a White Mage!! The Idols are obviously dancers 😌

Balei would be a Changeling Druid, Fausto a Human Fighter, Ziz is a Goliath Monk, Yuma a Satyr Bard, and finally Kul is a Human-Revenant Warlock

Gabriel would most likely be a warlock of some kind. In my head she's haunted by Giratina, so she would definitely have him as a patron. Not sure if she'd be a Hexblade or a regular spell slinging-lock or not. Ideas for my next campaign though? Hmm

I think she would be either Wood elf fae wanderer ranger or a Dryad summoner that summons forest creatures

Oooh Yorra would def be a high elf necromancer :3

I feel like Odd fits a little too well as a Warlock, with The Great Old One patron

... and a cat familiar

Wily would be a Dark Elf Engineer. Builds crazy shit and people assume he's evil from his looks. Is actually Chaotic good.

Estella would probably be a super cocky Elf Sorcerer. She would be the sort to confuse her natural talent for magic with actual knowledge and training. Definitely needs to be humbled by a well studied Wizard.

Despite being Human, Elio would be a Death Knight because of personal aesthetics and the class wields a sword whose design is somewhat reminiscent to his Aegislash's own in lieu of it's unusual typing.

This is both easy and difficult to answer at the same time because class wise, Jin = Monk and Mary = Bard. Easy. But I don't know enough about the available races in DnD to confidently say which they would be and just normal humans feels boring...