In her humanoid form, she has a blue bodysuit with a light red circle at her neck. Trudy also has short, curly yellow hair and a helmet around her head showing her pale blue skin. Some say she somewhat resembles a deep-sea diver or an astronaut because of the glass helmet and suit. As a waist, she looks like a light blue colored blob with eyes and a mouth.
- Based on her appearance, which resembles a deep-sea diver, Trudy could be an alien or a water elemental. Similar to how Zap could be a fire elemental based on his appearance as well.