From WiKirby, your independent source of Kirby knowledge.
Sailor Waddle Dee is a minor character who first appeared in Kirby Super Star (and later in its remake) in Revenge of Meta Knight. He is a Waddle Dee who wears a sailor's cap. Sailor Waddle Dee never directly interacts with Kirby, and is usually only present through his dialogue in Revenge of Meta Knight, or in the background in his other appearances.
Kirby Super Star / Kirby Super Star Ultra
Sailor Waddle Dee first appears in Kirby Super Star and Kirby Super Star Ultra, where he is one of the characters exchanging dialogue with the others during gameplay in Revenge of Meta Knight. His role is a more introspective, in contrast with the other characters trying to stop Kirby from boarding and destroying the Halberd. He is sometimes absent-minded, such as when he accidentally reveals the secret to destroying the Reactor.
Sailor Waddle Dee is not seen in the stages proper, instead jumping ship after Meta Knight is defeated by Kirby. Additionally, he has the least amount of dialogue of the Halberd crew.
Kirby Mass Attack
Sailor Waddle Dee reappears in Kirby Mass Attack, where he makes a cameo in the Meta Knight battle of the Strato Patrol EOS sub-game. He is seen cheering for him alongside Bandana Waddle Dee.
Team Kirby Clash Deluxe
Sailor Waddle Dee reappears as a minor cameo in Team Kirby Clash Deluxe, where he appears in the background of the village after Whispy Woods is defeated for the first time. He runs about behind the Gem Apple tree, chasing butterflies.
The following are all of Sailor Waddle Dee's lines of dialogue from Kirby Super Star and Kirby Super Star Ultra. For greater context, see the Revenge of Meta Knight chapter pages: