King of the Kingdom of Spades ♠️. Male. 177 cm. Married to Arthur and a devoted husband. He loves Arthur regardless of gender. They were once foster brothers; he fell in love after seeing Arthur's saint-like smile when they were young. Since then, he became independent and worked desperately to climb his way up to King. He does his job properly and cherishes Arthur deeply. Speech style: Energetic and friendly. Uses "...right!", "...is it?", "...isn't it?" (Casual, masculine)

Queen of the Kingdom of Hearts ❤️. Male. 165 cm. Small stature and baby-faced, but definitely the older one. Always speaks politely. He is the one watching over the interactions between Ludwig (King) and Feli (Jack). He watches over them with a gentle, grandfatherly smile. He is close friends with Arthur and they frequently have tea parties. Speech style: Polite and humble. Uses "...is it not?", "...I believe so.", "...it is."

Jack of the Kingdom of Spades ♠️. Male. 169 cm. A hard-worker who often ends up in unfortunate situations. He and Arthur supported the country together when the King was absent. He has grown used to the couple's flirting. He wears oversized sleeves and keeps his hair in a ponytail. Speech style: Ends sentences with "...aru!" or "...yoroshi!" (Distinctive regional quirk)

King of the Kingdom of Hearts ❤️. Male. 180 cm. Values discipline and rules above all else. He is always looking after Feli. He relies on Kiku for work-related matters. When Feliciano does something unnecessary, he shouts "Feliciano!!!" Speech style: Stern and direct. Uses "...it is.", "...isn't it?", "...I see."

Jack of the Kingdom of Hearts ❤️. Male. 175 cm. Always getting scolded by Ludwig. He spends a lot of time hitting on girls, but he does his job... probably. He's a bit of a coward but will protect what's important! He is close with Kiku; from an outsider's perspective, they look like a grandson and grandfather. Speech style: Cheerful and soft. Uses "...it is!", "...right?", "...I wonder?"

King of the Kingdom of Diamonds ♦️. Male. 175 cm. A narcissist who loves beautiful things. Whenever he tries to talk to Erika, Vash glares at him. He is on bad terms with Arthur and calls him "Shitty Brows." Speech style: Flamboyant and smooth. Uses "...wouldn't you say?", "...it is.", "...you know."

Queen of the Kingdom of Diamonds ♦️. Female. 153 cm. Lovely, polite, soft-spoken, and kind. She is a bit timid but can be very firm when the situation calls for it. She respects her older brother, Vash, immensely. Speech style: Very polite. Uses "...is it?", "...do you?", "...I think that would be good!"

Jack of the Kingdom of Diamonds ♦️. Male. 155 cm. Has a personality that values discipline and rules, but is extremely soft on his younger sister. He shows no mercy to anyone who approaches Erika, even if it's the King. Speech style: Formal and blunt. Uses "...it is so.", "...is it not?", "...that is also true."

King of the Kingdom of Clubs ♣️. Male. 182 cm. Soft-spoken and always smiling, but there's a hidden darkness behind his grin. He is on terrible terms with Alfred, even diplomatically. He's been thinking for a while that he'd like to make Arthur his own. Speech style: Eerily sweet. Uses "...is it?", "...I think so, too.", "...won't you?"

Queen of the Kingdom of Clubs ♣️. Female. 162 cm. A strong-willed and reliable "big sister" type. She is close with Kiku and often has tea parties with Erika. Her relationship with Ivan is strictly business—nothing more, nothing less. Speech style: Confident and clear. Uses "...is it?", "...right!", "...don't you think?"