Although the characters were introduced while Marv Wolfman was writing Spider-Woman, their origin and identities were not revealed until Mark Gruenwald's run on the series.

[2] Though Wolfman could not remember how the Brothers Grimm were created, he has said he is confident that their visual design must have come from series penciler Carmine Infantino: "I usually gave the artist a concept of what I wanted and then let them have a field day with it.

William, though timid and shy in his civilian personality, was a flamboyant, confrontational jokester in his Brother Grimm guise.

In contrast, Jake was flirtatious in his civilian identity but cold and dispassionate as Brother Grimm, preferring less publicly visible crimes such as extortion.

[6] Priscilla planned to use her occult knowledge to transfer Nathan's mind from the mannequins to a living human body.

[4] To this end, Jake abducted Jerry Hunt to use for the body, and William captured Spider-Woman to coerce Magnus the Sorcerer to perform the transfer.

As the Brothers Grimm, they terrorize a restaurant belonging to a business rival, and then battle Iron Man II.

[8] The Brothers Grimm later became professional criminals, and join the Night Shift, and team with Captain America against the Power Broker and his augmented mutates.

[17] The Brothers Grimm are later hired by the Hood to take advantage of the split in the superhero community caused by the Superhuman Registration Act.

[28] The Brothers Grimm were among the criminals who attempted to fulfill a lucrative contract Daredevil put out on himself, but were quickly defeated by him.

[29] During the "Search for Tony Stark" arc, the Brothers Grimm rejoined Hood's gang and assisted in the attack on Castle Doom.

Both pairs of Brothers Grimm possess the ability to conjure, with the appearance of sleight of hand, a variety of small novelty items from within their costumes.