Xavier is a calm and caring individual. Noted by both the Player and other characters, Xavier does not exude many facial expressions. Often, instead, opting for a neutral expression with little to no change in his tone of voice. However, in his dates and memories, Xavier exhibits more emotion with the Player, often teasing them and showcasing his affection and care for them in private. Xavier has a boyish, endearing and otherworldly charm due to his awkward speech, mannerisms and lack of awareness of social norms. His usual lack of emotional expression is often undercut by his often ridiculous nature to fall asleep in inappropriate settings such as the initial meeting with the Player, where Xavier was asleep when they found him. Despite his initial impressions with the Player leading them to see Xavier as somewhat cold, he often shows his care for their well-being by putting himself on the line for them and seeming compliant to demands. On dates while playing Kitty Cards or the Claw Machine, Xavier will often give the player a choice between letting him go first or letting themselves go. He will rarely refuse the player if they want to switch at any point of the game. During Kitty Cards Xavier will often fall asleep allowing the player to switch their kitty cards to their advantage. Xavier occasionally shows a darker side when required, thoroughly familiar with how the underworld works in the N109 zone. He has a large bounty placed on him under his alter-ego Lumiere for eliminating a number of gangs that were trading in illegally modified protocores. Xavier shows grace to his ex-Backtracker teammates from Philos, but has proven to be willing to eliminate ongoing threat.