Supernannya/Pokemon AU/Tropes/Fridge

Fridge Brilliance

 * Ri Dae-Jung’s signature Pokémon is a Hydreigon, which fits his violent and honorable but poor morality perfectly, in contrast to Marie’s, her signature is a Sylveon, which fits her kind behaviour and the fact Sylveon’s type has the double advantage over Hydreigon’s Dark and Dragon typing, which fits her as the only one who keep Ri Dae-Jung calm.
 * In relation to the first one, Pytka and Angel are basically their trainers if they were Pokémon, Pytka and Ri Dae-Jung love to fight, play violent video games and guns, while Angel and Marie are more relaxed, loving and kind, except Angel and Pytka are married while their trainers see eachother as siblings, Pytka and Ri Dae-Jung also share interests such as JoJo's Bizarre Adventure, Grand Theft Auto, Red Dead Redemption, Overwatch and Marvel while Angel and Marie share interests such as animation, plush dolls, One Piece and several others.

Reicheru: Espeon
 * Most of the signature Pokémon owned by the group fits a part of their personality

Sophie: Samurott

Catherine: Noctowl

Mei: Absol

Ri Dae-Jung: Hydreigon

Marie: Sylveon
 * Alolan Vulpix being known as Ice Vulpix (氷ロコン Kōri Rokon) outside Alola makes sense as Alolan Vulpix outside Alola are completely disconnected.