Marcille is an elven mage and member of Laios' party.
Marcille is an elf with long blonde hair and green eyes. In her normal dungeon attire, she wears a long blue dress with white pants, a blue cowl, a red choker, and sandals. She styles her hair differently every day. She is taller than Chilchuck and Senshi, but shorter than Falin and Laios.
Marcille is intelligent, principled, and loyal to her friends. Despite this, she can also be very high-strung and has a difficult time dealing with things far outside her comfort zone (such as eating monsters). She has a lot of confidence in her ability to cast magic due to her background, and can feel lonely when she's unable to help the party with her specialty. She can also be kind of naive, believing that friendships alone can keep a party together.
Falin is Marcille's closest friend. She thinks very highly of Falin, calling her incredible and an angel because of her spell-casting ability and kind nature. She enters the dungeon again despite the party's dire circumstances because of how much she cares about her.
Marcille's father passed away when she was quite young. Her pet bird Pipi also passed away at some point.
Marcille studied as the best student in the Magic Academy, becoming the teaching assistant only five days after starting her studies there. She joined the research program specializing in dungeon-making, as she wished to create a safe dungeon, one where people could safely grow and harvest magic items, such as mandrakes. To that end, she joined a dungeonium-making class, where she met Falin. Although Marcille's dungeonium was textbook-perfect, Falin's went above and beyond expectations. When Falin showed Marcille how she made it, leading her to a dungeon she visited often, Marcille was grateful to her. They became fast friends because of it, and remained close throughout their time in the academy.
(Source: Dungeon Meshi Wiki)