Diana is a human character best known for her role as a Queen Candidate. She's typically depicted with long brown hair styled in a bun, and fans often note her iconic first appearance outfit: a wedding dress paired with an oversized pink heart necklace.
As a Queen Candidate, she wore more practical attire—a long-sleeved white shirt layered under a yellow hooded vest, along with an orange skirt, knee-high socks, and black shoes. She was apparently a Queen Candidate herself at some point; Momona inherited her letterpen, suggesting she passed the role down.
Diana is married to Momona's cousin and was formerly partnered with Luea during her time as a candidate.
Content compiled by AnimeList.moe from publicly available sources.