Mitsumi Seto is the protagonist of Heroes of the Sea Lifesavers. She shares a childhood bond with Souya. Her culinary skills are commendable, but her swimming abilities are severely lacking. For an entire decade, she has been unable to swim, a consequence of nearly drowning during a boating incident with Souya at sea.
Seto made cameo appearances in Hayate no Gotoku! specifically in Chapter 75 and Chapter 359, yet her role did not influence the primary narrative.
(Source: Hayate no Gotoku! Wikia)










