Lisa Isaribi stands 167 cm tall at 19 years old, distinguished by light red hair often tied in a knotted ponytail and light burnt orange eyes. Horizontal striped tattoos mark her upper left arm and right thigh. Her initial attire featured a white crop top, modified dark jeans, a skull-buckled tool belt, and black clipped shoes. As a Knight of the Ashen Flame, she wore a white robe bearing the Holy Sol cross, gauntlets, and armored boots. Upon joining Special Fire Force Company 8, she adopted their orange jumpsuit worn open to reveal a black crop top underneath, paired with black boots. Orphaned by an Infernal that killed her parents, Lisa developed a deep fear of fire. Exposure to a Bug transformed her into a Third Generation pyrokinetic, erasing that fear. Dr. Giovanni and the White-Clad took her in as a child, subjecting her to extensive brainwashing. Operating under the alias "Feeler," she infiltrated Vulcan's Workshop, posing as a refugee to locate the key to Amaterasu. Vulcan discovered her in the junkyard and brought her into his workshop, where she forged a familial bond with him and Yū. Her initial demeanor appeared kind and loyal toward Vulcan and Yū, masking antagonism towards the Fire Force and her true allegiance to the White-Clad. During the Vulcan's Workshop arc, she betrayed them, attacking with her pyrokinetic powers and demanding the Amaterasu key for Giovanni. Despite her ruthless actions, conflicted emotions surfaced, causing a brief hesitation when Vulcan urged her to escape. Rejoining the Knights in the Netherworld arc, she confronted Vulcan and Company 8 Captain Akitaru Ōbi. Vulcan's declaration that he entered the Netherworld to rescue her triggered visible emotional turmoil. Giovanni intensified psychological manipulation, threatening her life to coerce Vulcan. Ōbi's intervention and Vulcan's rescue freed her from Giovanni's control. Evacuated to a medical clinic, she was traumatized but severed from the White-Clad. Formally joining Company 8 in the Haijima Industries arc, Lisa adopted a tougher, sarcastic exterior while revealing a playful and goofy side. She assisted Vulcan as a technician, contributing to engineering projects like advanced extinguishing weaponry. Discussions involving Giovanni or the White-Clad could trigger lingering trauma, requiring Vulcan's support. Her loyalty solidified during the Ōbi's Rescue arc, participating in the mission to save Captain Ōbi despite being branded a traitor. As a Third Generation pyrokinetic, she manifests octopus-like tentacles from surfaces or her waist for blunt strikes or grappling. These flames possess magnetic properties, locking onto biological or mechanical magnetic fields, a trait that also creates vulnerabilities opponents can exploit. Personal trivia includes self-identifying as a crybaby, enjoying all foods except spicy items, loving animals, and aspiring to marry and have children. She respects Vulcan, harbors hatred and fear toward Giovanni, enjoys karaoke, and assists Vulcan daily. Academically, she prefers science over mathematics. During the Great Cataclysm arc, Lisa died. Shinra Kusakabe's manipulation of time reversed this event, restoring her to life within the rearranged reality.