King and Queen Butterfly
Moon the Undaunted
River Butterfly: Formal, strict, sometimes childlike, good-hearted Moon Butterfly: Strict, serious, well-intentioned
River Butterfly: Medium height, muscular, fair skin, blond moustache and beard, light blue eyes Moon Butterfly: Slender, fair skin, purple diamonds on her cheeks, purple lipstick, heart-shaped pale blue hair, light blue eyes
King and Queen of Mewni
Eclipsa the Queen of Darkness (ancestor)
Solaria the Monster Carver (ancestor)
Celena the Shy (ancestor)
River Butterfly: Fighting monsters, his daughter Moon Butterfly: Making her daughter to follow directions, seeing her daughter mature
River Butterfly: The frustration of being King Moon Butterfly: Star's reckless and irresponsible behaviour, anything messy or destructive
King River and Queen Moon are the parents of Star Butterfly, and the rulers of the extra dimensional kingdom of Mewni, from the show .
Star vs. the Forces of Evil
Despite seeming just as formal and strict as his wife, it is revealed in "
Diaz Family Vacation" that he enjoys fighting monsters like Star does, whenever his duties as king bore him.
She was once the previous owner of the
Magic Wand before passing it onto her daughter on her fourteenth birthday. She is known to be serious most of the time, having low tolerance for anything messy or destructive, which is why she disapproves of Star's reckless and irresponsible behaviour.
In " Storm the Castle" it is revealed that King Butterfly's first name is River.
According to Daron Nefcy, Queen Butterfly's first name is Moon.
In Season Two, Queen Moon receives a redesign to her appearance.
In " Into the Wand", it is revealed that Queen Butterfly was the one who first defeated Toffee and severed the middle finger on his right hand.
King and Queen Butterfly on Star's Mirror
"I didn't see you and you didn't see me."
Moon's tapestry of her fighting Toffee