Roxilius, a butler summon crafted to serve Cayna, operates as a frontline combatant with a registered age of 16. His status as a level 550 vanguard all-rounder highlights expertise in sword combat, utilizing a standard one-handed blade. Initially programmed as a catfolk magical warrior within the game’s framework, his duties extend beyond battle to encompass adaptable support in domestic routines and guardianship of Luka, a child under Cayna’s care.

His dynamic with Roxine, a maid summon and counterpart, thrives on rivalry and sharp exchanges, yet both remain jointly committed to Luka’s upbringing. Cayna mediates their clashes to prevent discord from affecting the child, whom affectionately shortens Roxilius’s name to “Li” due to speech limitations.

Early narrative drafts, like the web version, depict Roxilius joining Cayna’s group at a Felskeilo festival, though later revisions reassign this role to Roxine. This duality—warrior instincts tempered by household obligations—underscores the flexible roles summons assume within the reshaped game environment.

While extended arcs or cross-media evolution remain unrecorded, his core identity merges martial skill and nurturing responsibility, molded by Cayna’s commands and his coexistence with fellow summons.