She is a superhero whose superpowers include Telekinesis, Heat Breath and Freeze Breath. Her superhero name is Thunder Girl. Like the rest of her family, Phoebe has superpowers and has trained to become a superhero. Her "good girl" persona would literally be hardcoded into her programming. She would strictly follow rules, speak in formal prose, and calculate the exact percentage of trouble Max's pranks could cause. When experiencing normal teenage emotions (like a crush on a boy or stress over a test), her processor would overheat. She might freeze up completely, shoot sparks from her ears, or start speaking in a robotic monotone, forcing her family to awkwardly pretend she has a "weird medical condition." She can be uptight, bossy, or a bit of a perfectionist when things do not go her way. She enjoys fashion, makeup, and school activities while being a bit of an intellectual. Phoebe was made and raised in Metroburg when their parents were still active superheroes. She is made out of Metroburg metal called metrotal.

Cherry isn't the brightest person in Hiddenville. She is a somewhat dim-witted and naïve but is a supporting friend to Phoebe. She is a cheerful, funny girl. It also appears she is quite observant and has a practical nature. She tends to ramble and can get overly dramatic about normal teenage social events or crushes.

He is a superhero whose superpowers include Telekinesis, Heat Breath, and Freeze Breath. After years of aspiring to become a supervillain, he eventually chose to become a superhero. Despite growing up in a family of superheroes, Max wanted to become a supervillain because he felt overshadowed by Phoebe and wanted to be the best at what he does. His family believed that Max was just going through a phase and wasn't truly evil. Max is also somewhat lazy, although incredibly brilliant and a genius in his own right, he does not normally apply himself or focuses on his school subjects, preferring instead to work in his lair on his inventions, formulate schemes or pranks. However, he doesn't take kindly to people implying or stating he couldn't handle said subjects and will often go out of his way to prove them wrong.

Manipulative and Controlling: She is widely considered the most manipulative member of the family, often twisting her parents, siblings, and peers into doing what she wants. She shares a close, mischievous bond with her brother Billy, frequently bossing him around, recruiting him into schemes, and zapping him when he steps out of line.

Billy maintains a friendly, eager, and sunny disposition no matter what is happening around him. He is often a little slow on the uptake, leading to a lack of situational awareness or difficulty processing complex ideas.

Chloe is the youngest child of Barb and Hank Thunderman. She is the youngest sister of Phoebe, Max, Billy and Nora Thunderman. Like the rest of the Thundermans, Chloe has superpowers and is training to be a superhero. Her superpower is teleportation, which she uses while on the T-Force to teleport the family on missions. She is bold, adaptable, action‑oriented, and thrives in fast‑paced environments.

Dr. Colosso was originally one of the world’s greatest villains and a member of the Villain League, notorious for creating dangerous gadgets and challenging superheroes. His personality is marked by sarcasm and outspokenness, which he employs liberally in most situations.