Rem Galleu

Rem Galleu is one of the main female protagonists in How NOT to Summon a Demon Lord (Isekai Maou to Shoukan Shoujo no Dorei Majutsu).

She is a young Pantherian (a cat-like beast race) girl, around 14 years old, with a slender, toned build, long black hair reaching her waist, rare black cat ears and tail, and striking green almond-shaped eyes that often give her an expressionless, doll-like appearance conveying strong willpower.

As a skilled summoner magician (around level 40) with an earth affinity, she specializes in summoning beasts and excels at fast, offensive combat. She became an adventurer out of necessity, driven by a major secret: the soul of the Demon King Krebskulm was sealed inside her body (inherited as a curse from her family line), which would eventually kill her if fully released.

Along with the elf Shera, Rem accidentally summoned the protagonist (Diablo) intending to enslave a powerful being for her own goals, but the magic backfired, making her (and Shera) his slaves via magical collars instead.

Personality-wise, Rem tends to be stoic, reserved, and quick to hide her emotions or get flustered, though she has insecurities (like A-cup angst in a race where larger chests are common) and gradually shows more vulnerability and affection toward Diablo. She's determined, independent, and focused on overcoming her curse to live freely.