Side character

Unkown

Male

Jack Knapp

He has to shave extremely carefully so he doesn't grow a beard over the bandages.

If you thought I was gonna list this...

Clear

5ft 11

75 kilos

Okay, seriously he's the invisible man if you ask me what he looks like I'm gonna say a window.

athletic. So he's lightly muscled

Clear

Caucasian

Clear

Nazi's. Demon's

photographic memory

He likes stroking his bandages. It's not like he has a beard. Sometimes when he is bored he'll take off his glove and stare through his hand.
He jokes about how he knows more about the world than the back the back of his hand.

Mr. Hollow loves his job and he knows that him working his ass off is worth having to watch demons destroy cities.

He is sometimes a little intense, either takes the job seriously or fools around.
Textbook narcissism, he always puts himself on a high horse.

Mr. Hollow is a pro at sneaking around being the invisible man and all.
He is just mind blowing at darts.
He can perfectly do a British accent
He can perfectly recite Red Right Hand in his head.

Solving puzzles.
Bowling
Darts

Mr.Hollow relishes himself in a way that he knows he's a unique and strange person and he loves that in a way. He is always proving he is the smartest person in the room whether he's a rookie or a vet. He picks up on almost every detail.

Clear (Soz that's just gonna be my every colour related answer for this guy lol)

Dogs. Sometimes they're the only thing that knows he's real.

1911 Colt

A picture of him and his old girlfriend from WW2.

Detective

Christianity

White Warden of S.I.E.D.

Glenn Miller- In The Mood
Red Right Hand

Before becoming the 2nd invisible man, he was Jack Knapp a U.S army private who was close to finishing his service in 1945. But he found all the Nazi experiments with black magic and suddenly got involved and stopped a Nazi zombie army. Once S.I.E.D. picked him up and covered up the whole scene they almost immediately hired him. In 1949 he was investigating the last known location of Griffin's invisibility formula. He found someone attempting to steal it. He confronted this person but in the scuffle, a small amount splashed on his skin turning him permanently invisible. He has since aged much more slowly and in modern day he is more like a 50-year-old instead of dead. He wears bandages around his face and a pair of goggles. He wears a large trench coat, fedora, suit pants and gloves at all times.

After about of year stuck on desk duty he was allowed to rejoin field work under special conditions. Jack convinced S.I.E.D. that a covert group such as themselves couldn't pass up an invisible operative. Jack also made them promise to never use the formula on another soul. They promised and the formula has since been destroyed. It was however synthesized into a chameleon formula and used to make clothes. So he wouldn't have to run around naked. Also, he needs them to make more invisible clothes so that when they wear out he gets new ones.

Jack Knapp made it to his 11th year in high school.

Mr. Hollow is a distinguished White Warden of S.I.E.D. He is an amazing detective of both natural and supernatural crimes. He is a proud WW2 veteran. He is the longest living member of the S.I.E.D. He would give Tobias Ash a run for his money however Jack is only an investigator, not a hunter but he knows how to kill demons and does.

He craves cigarettes but can't smoke all the time cause he doesn't want to accidently light himself on fire.

Mr. Hollow is permanently invisible. He also ages slowly.
Also, he has a photographic memory.

Mr.Hollow wears a fedora, bandages around his entire head. Large round black goggles with a dark greenish-blue lense. He wears what you'd expect a detective from the '40s to wear. A striped suit. on top of that a WW2 dark brown leather trench coat, He wears black leather gloves to obviously cover his hands.
He wears a blue woolen scarf tightly tucked into the trench coat.