Bonnie is the most active in the game. He's usually the first to move and has a habit of jumping around the pizzeria, almost taunting you. With that in mind, he strikes me as a more playful member of the group.

Since my thought on Foxy was him constantly repeating his last moments of human life, Bonnie is as well,but the child who possess' the Bonnie suit either doesn't believe he's dead, or he denies it. So when he wakes up, it's just another day of playing with his friends and the guard is just another player. Until the suit itself takes over for the more gruesome activities.

(Continuing series of five nights head canons. Here's Foxy: https://www.weasyl.com/submission/718967/why-foxy-runs )