Matoya, Archon Elder is a sweet draw engine, and I can see her fitting into Kenessos sea creatures, Tales of Middle-earth blue-green decks like Elrond and Galadriel, and shell also just generally be a good engine piece in graveyard strategies that surveil a lot, like Mirko, Obsessive Theorist
Sephiroth on the other hand plays into the usual control strategies favored by Blue/Black by growing in strength for every opposing creature you remove from play
10 Tipo Growing Son Sneaking in at 10, Tipo is already seeing play over some of Sapphires other ramp cards
In addition to being a beloved character from a fan-favorite Final Fantasy game (in this case, Final Fantasy X ), Yuna's card has some powerful utility in-game, able to bring discarded enchantments back from a player's graveyard
For three ink, you can play this card to ready a character
Cloud, Tidus, Terra, and Yshtola will each lead their own 100-card precon decks, as designers for the set sought to focus on fan favorites while also prioritizing characters that most flavorfully integrate Magic: The Gathering mechanics