Unsorted notes:

He uses the barbell (name's sake) like a hammer

His Barbell is 200 lbs (90 kg) on the one side

He can swing it with one hand, although slowly

He was actually a sergeant in the military (discharged for brutality)

This is canonically his son

He makes drill sergeants look like kind people at times (the reason he was discharged, as mentioned)

Someone accused him of eyeballing miss circle (their body was never found)

He helps at shelters on weekends (something about "continue serving his country")

He claims to have eaten a pistol before. Bullets and all. (No one wants to try to deny that)

He has also eaten a gremade. (The janitor can confirm, he watched it)

Surprisingly, he's more strict than he is violent. He'll still pummel you into the floor if you wrong him but in gym he'll just yell at you

His favorite color is desert camo

Artist's notes, still unsorted:

Was originally planned to have a tank top but opted out of that

The name came to me halfway through

He knows the school well enough that his son goes to a different one (yes it is a special ed)

I accidentally fit the baldi style more than the FPE style

Yes, as with all other OC's, he has spawned in peiku somewhere