A member of the "Creative Society" with a sharp tongue and an attitude to match. Gelda is introduced as a girl that likes putting Seigi on the spot, and enjoys picking on him when given the chance. Her competitive nature constantly puts her at odds with Giselle, to the point that Gelda regularly issues challenges to Giselle (first out of pride, but later over Seigi).
(spoiler hidden) Despite her occasional arguments with the protagonist, she actually likes him very much, and in part wants him to pay attention to her.
[From
Moroboshi Yuumei's review]