— Mark | 01

He loves playing the guitar. He's incredibly fond of it, and if anything were to happen to it, he'd be furious. It's like the most precious thing to him.

When he's bored, he goes to the pizzeria to see Bonnie, his favorite animatronic. He looks at him with admiration and longing, as if he wants to play like him someday.

Sometimes he walks through the city alone, wanting to reflect or think about his actions, although afterwards he forgets and does his bad deeds again.

He usually leaves little notes or small gifts in his guitar case, because he knows that nobody would touch his guitar and he keeps them there.

Being easily influenced, he won't take into account the opinions of anyone other than those he considers superior. If he were to enter a relationship, he would be immature: people would idealize him, believing he would be perfect, but in reality, he isn't. He wouldn't consider the consequences of his actions and wouldn't apologize if he hurt his partner.

He's so influenced by Michael Afton that he'd be completely swayed by him or the group. If someone told him to end the relationship, he probably would, and it wouldn't be because he didn't love you; quite the opposite. Sometimes it might be because he wouldn't feel right with you, or he'd simply be indifferent to you and end things. But even if you did end things because he was influenced, within weeks he'd be practically begging you to come back.

Having an argument with him is like trying to resolve conflicts with someone who's deaf; he'd just stare at you without listening. Mark is a perfect example of that. He wouldn't care about your opinion, and in short, he wouldn't care about you. He wouldn't seek your approval; he'd seek the approval of his group.

Mark, known for wearing the Bonnie mask in Five Nights at Freddy's 4, is characterized by an impulsive, mocking, and highly impressionable personality, acting as Michael Afton's main follower during the bullying of his younger brother.
Follower and easily influenced: He does not usually take the initiative in jokes, but seeks the approval of the group —especially Michael's— by actively participating in bullying without questioning the limits.
Mocking and cruel: Enjoys the suffering of others for pure group entertainment, laughing at the Cry Baby's phobias and showing a defiant attitude.
Lack of empathy and maturity: He lacks the sensitivity to measure the consequences of his actions, which culminates in his direct participation in the "Bite of '83" tragedy.
Late remorse: After the fatal accident in Fredbear's mouth, he is visibly shocked and paralyzed, revealing that his cruelty stemmed more from youthful irresponsibility than malicious evil.

The teenager wearing the Bonnie mask in Five Nights at Freddy's 4 (commonly called Bonnie Bully or Bonnie Bro) stands out for his 80s look and summer outfit.
The character's original sprite design features the following visual characteristics:
Mask: He wears a blue-violet/purple plastic mask representing Bonnie the Bunny, with his characteristic white snout, black nose, and long, upright ears on top.
Hair: Short, slightly curly or loose, dark brown hair.
Top: A wine red / rose red t-shirt that leaves her shoulders and arms bare.
Bottoms: Shorts or bermudas in light blue.
Skin and complexion: She has a tanned/brown skin tone and an average complexion compared to the group of teenagers in the game.
(Note: In the official canon of the saga, this character does not have the confirmed name of "Mark" —the names of Michael Afton's three companions were never officially revealed in the main games—, but that is his appearance in the FNAF 4 sprite).