Elyun Grimwald, known as Eren or operating under the alias Ellen within Kaval's Party, is an adventurer concealing her true identity as a member of the royal family from the Sorcerous Dynasty of Sarion, specifically the daughter of Archduke Erald Grimwald. She hides her elven heritage while adventuring, typically masking her ears with magic. Her appearance features blonde hair, eye color depicted as blue in the manga and green in the anime, and distinctive facial markings beneath her eyes. She commonly wears practical travel attire suited for adventuring, including a blue tie-on headband. Born into Sarion's nobility, Elyun studied at the Royal Capital Academy before departing her homeland to pursue freedom as an adventurer. Her bodyguards, Kaval and Gido, formed her adventuring party. Although Kaval is the party's nominal leader, Elyun often demonstrates more decisive leadership. She kept her background as a runaway royal hidden during her early exploits. [citation:] Elyun exhibits a cheerful, positive, and empathetic personality, though she can display occasional selfish tendencies. Her defining compassion makes her unable to bear seeing others suffer; she prioritizes aiding those in need, even at the risk of exposing national secrets. This loyalty drives her quick acceptance of allies, such as welcoming the masked Shizu into her party and later befriending Tempest residents like Shuna and Shion. Initially dispatched by Fuze of the Free Guild to investigate the Storm Dragon Veldora's disappearance, her party explored his cave. After reporting their findings, they encountered Shizu in the Forest of Jura. When the fire spirit Ifrit possessed Shizu, Elyun cooperated with Rimuru Tempest by firing her "Icicle Lance" spell at him, enabling him to absorb and replicate the ability. Following Shizu's death, Elyun's party paid respects, received new equipment from the dwarf Kaijin, and departed. They later returned to guide others to the newly established monster city of Tempest, experiencing a comedic mishap when Kaval provoked a Knightspider, requiring rescue by Gobta's goblin riders. Elyun played a pivotal role after the Falmuth Kingdom and Clayman's devastating attack on Tempest, which caused numerous deaths including Shion. Revealing her royal identity to Rimuru, she informed him of the legend surrounding the Harvest Festival ritual, recounting how Demon Lord Milim Nava used it to resurrect her pet dragon. She suggested Rimuru could similarly revive his fallen subordinates by evolving into a Demon Lord, advice directly influencing his decision to undergo the ritual and awaken as a True Demon Lord. In combat, Elyun specializes in magic, demonstrating proficiency in team-based engagements and strategic support. Her abilities include precise spellcasting like Icicle Lance, showcased during the confrontation against Ifrit. While her initial equipment was standard adventurer gear, it was upgraded after her experiences in Tempest.