In DND, Daichi Mochizuki would multiclass. He would be a rogue and a ranger, balancing them relatively evenly. His stats, from strongest to weakest, would be dexterity, constitution, intelligence, wisdom, charisma, and strength. I have too many ideas for Ume. I'm really not sure what she'd be. My first idea was swashbuckler because she's zealous and playful. Then I thought she might be an Oath of the Crown paladin, unless we're talking Unearthed Arcana, where she would instead be a Protection domain cleric. I figured that she'd probably be a defensive character due to her loyal nature. Because of this, I don't have any clue what her stat order would be, since different parts of her would be highlighted depending on class. The only idea I have is that intelligence would probably be her dump stat. Granted, I've never actually PLAYED DND, I've just watched some. Ume would spend all of her time with Kazuichi, who's OBVIOUSLY an artificer.