Rosely's appearance is, as her name implies, based on a rose. She has a vivid green stem covered in grayish thorns. Her face is completely black and has no facial features except for very large blue eyes. Surrounding her shadowed face are dozens of crimson rose petals.
Rosely serves as a harder version of Lovely in the sub-game Revenge of the King. Once Rosely spots Kirby, she will extend her thorn-covered stem and clasp Kirby within her rose petals and continuously damage Kirby until he escapes. Like Lovely, Rosely can be mounted on either the ground or the ceiling, and thus cannot be inhaled. Rosely often swishes around the leaves at her base and occasionally winks at Kirby if she has the chance. She is weak to the Blizzard element and the Cut property.
Rosely also appears as a keychain in Kirby: Triple Deluxe.