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.