Gregor is a good-humored and composed man with a bit of a competitive side. He was previously affiliated with the Smoke War, having fought for the old G Corp. alongside other bug-augmented test subjects prior to joining Limbus Company.

He is the focus character of Canto I: The Outcast.

Gregor is a friendly, easygoing man with a casual manner of speaking. Compared to many of his coworkers, Gregor is considerably amicable, and tends to maintain a cursory attitude. In place of a proper title, he refers to Dante as "Manager Bud", and is not averse to the number of teasing nicknames Rodya refers to him as, indicating that he is happy to maintain cordial, nonchalant relationships even in a professional setting. He is not strict nor hostile to those around him, and Dante looks to Gregor as someone who would willingly uplift the group's mood in dour situations.

Gregor also possesses a "cutesy" side to his personality, usually poking through when he is embarrassed. Both Canto II and III see him acting out a bit and failing miserably, leading to him growing flustered and sheepish. He also has a tendency to use phrases uncommon for someone his age, such as "bugger", "shoot", and "whoop". However, in all such cases that lead to some embarrassment for him, Gregor proves himself to be a good sport. When Charon calls him out for not wanting to be called Bug Guy yet calling her Bus Girlie, he does not grow agitated or ashamed, but instead laughs and agrees with the fairness of her argument. This kind of fun attitude is a consistency in Gregor's character.

Still, in situations that affect Gregor negatively on a personal level, his demeanor noticeably changes. During these times, Gregor grows silent and distant even to the rest of the Sinners, as if he is contemplating something. When faced with an unexpected reunion with Hermann- the woman who ruined his life- he does not grow aggressive or angry, but rather silently downcast. He reacts to adverse treatment from old G Corp. soldiers and Yuri's death in the same manner. He shows a tendency to swallow his emotions and just take it when treated particularly poorly, rather than firing back or expressing frustration.

Similarly, Gregor does not like it when the other Sinners make jokes at his expense about his verminous arm or general relation to bugs, yet doesn't stand up for himself much, or correct their behavior in a way that keeps them from doing it again. Still, he gives them more attitude for it than he does to those mistreating him in more serious situations. Gregor's tendency to react more outspokenly to things that bother him on a surface level yet go quiet when it comes to those that affect him deeply often acts as an indicator about how strongly he feels about certain affairs.

Gregor's generally goodhearted, amiable attitude does not go unnoticed by the likes of Dante, Rodion, Yuri, and Rodya. His compassionate side usually shines through the act of keeping an extra eye out for Sinclair.

VOICE REF:
https://www.youtube.com/watch?v=to_4-SeDid8