In Ultimate Alien, Ma Vreedle looks like a very plump female Vreedle (even fatter than Rhoboid), has short blonde hair and wears a pink dress and white gloves.
In Omniverse, Ma retains her short blonde hair and is still very fat. Now, she wears a brown cowboy hat and a long yellow dress with a brown jacket.
As described by Kevin, Ma Vreedle is far more dangerous than her cloned sons, more intelligent than Octagon and more violent than Rhomboid.
Despite being a greatly feared criminal, Ma Vreedle has a powerful maternal instinct and desires greatly to be a mother. However her maternal feelings do not extend to her eldest sons since they were made from a bad batch of cloning material and is highly favouritist towards her perfect Pretty Boy clones since they are properly made. She doesn't express pride in Octagon or Rhomboid, near all communication with them is barking orders, and after a while she decides she doesn't need them anymore and tries to outright kill them.
Ma Vreedle views her action as justifiable since she's killing only six billion humans but creating 3 to 400 billion Vreedles.
Nonetheless, she doesn't think it's right to put other mothers in the same burdens she has to go through.
Powers and Abilities
Ma Vreedle doesn't appear to possess any real powers except for enhanced strength, enhanced speed and two eyes on the back of her head. Her ferocity and brutality allows her to even take on the entire staff of Plumber's HQ singlehandedly. Like other Vreedles, Ma Vreedle can survive in space without apparent difficulty. According to Derrick J Wyatt, Ma is not afraid of Toepick.
The only real weakness she has is her maternal instinct toward Pretty Boy and its clones. As such, Sandra was able to convince Ma Vreedle not to blow up the Earth, by comparing her relationship with her own son. Seeing how much she loved her own son, Ma Vreedle backed down and the planet's destruction was averted.