Rem Galleu is one of the heroines in How NOT to Summon a Demon Lord, a leopard-person adventurer and summoner. She is notable for her exceptional martial artist lineage and for bearing the sealed soul of a Demon Lord.
She is a small, cute girl with fluffy animal-like ears and a long tail reminiscent of a cat. Her features and build emphasize her leopard-person heritage.
She carries a major secret that heavily influences the story and her choices. Her drive to “continue proving her strength” shows determination rooted in a serious personal mission.
Rem Galleu is a leopard-person from a family renowned for martial arts. Within the Galleu family, the Gad lineage is a line of Fist Saints, and she inherits that tradition.
Only her aunt, who serves as the school’s deputy master, can match her among their lineage.
Across generations, her ancestors had the soul of a Demon Lord sealed within their bodies, and Rem inherited it from her mother.
She constantly seeks a way to overcome and remove that soul to secure her future.
At the start of the story, her summoner level is 40. As a martial artist, she is 80+.
She fights primarily as a summoner despite her very high martial level because she cannot afford to die while carrying the Demon Lord’s soul.
She has contracts with seven summoned beasts. Her martial prowess stems from the Galleu family’s Fist Saint tradition.
Takuma Sakamoto: She summons him to help defeat and manage the Demon Lord’s soul sealed within her. Their connection begins as a practical strategy to overcome her burden.
Edelgard: With Edelgard’s help, Rem extracts the Demon Lord from her body for the first time. This cooperation is vital to her survival.
Klem: The Demon Lord (Klem) whose soul is sealed within Rem is partially removed, then fully extracted later via ritual. Klem’s presence defines Rem’s risk and motivations.
Galleu family: Her lineage in the Gad tradition shapes her training and identity. Her deputy master aunt is the only one in the clan who can rival her as a martial artist.
Dark elves: Their village’s ritual magic completes the removal of the remaining part of the Demon Lord’s soul.
Voice: Azumi Waki. She is directly connected to a pivotal secret that drives the plot forward.
She resembles Cal, and both share the trait of having a gluttonous, busty royal among their companions.
No direct quotes are provided in the source text.
Motivation to Become an Adventurer
Rem aims to become an adventurer out of a specific purpose: to continue demonstrating strength. This mission links directly to the dangerous secret inside her.
Demon Lord Within and Summoning Takuma Sakamoto
She inherits the Demon Lord’s soul from her mother and searches tirelessly for a way to defeat it. She summons Takuma Sakamoto specifically to help overcome that inner Demon Lord.
Extraction with Edelgard
Despite fighting as a summoner to minimize risk, she ultimately borrows Edelgard’s hand to extract the Demon Lord. This extraction significantly reduces the immediate danger to her life.
Final Purification by Dark Elf Ritual
Even after the extraction, part of the Demon Lord remains inside her. The dark elf village’s ritual magic then removes the rest, completing her cleansing.
Related entries: How NOT to Summon a Demon Lord; How NOT to Summon a Demon Lord character list.
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