Presented as a human maid serving the Alpha Gang, Helga is later revealed to be a robot assembled by Dr. Z from a pre-designed kit. She resembles a stocky middle-aged woman with a square face, brown eyes, and dark gray-brown hair in a bun. Her attire consists of a white apron with blue frills over a yellow vest and maroon skirt, completed by brown shoes.

Her name, Talbone in Japanese, potentially parodies "tailbone," reflecting her role as a persistent annoyance due to her strict, intimidating personality. She enforces rigorous study routines on children, including Alpha Gang members, and is feared by all except Seth. Despite this, she fiercely protects Rod and Laura, confronting Seth when his unauthorized missions endanger them.

Helga possesses superhuman strength, momentarily staggering dinosaurs like Stegosaurus and Pentaceratops with a soup ladle. She demonstrates exceptional speed, running across water, heightened reflexes deflecting projectiles, and considerable durability against dinosaur attacks and collapses, though vulnerable to intense fire. She is also an expert cook, creating refined dishes, though malfunctions produce inedible concoctions.

In the first season, she accompanies Dr. Z on missions, managing household duties and piloting the timeship Backlander. Her concealed robotic nature is hinted by surviving lightning strikes and instantly appearing at distant locations. Discovering Seth's unauthorized missions for Rod and Laura, she confronts him across the ocean but is deactivated by an electrical shock. Reactivating malfunctioning, she exhibits erratic behavior like vacuuming faces and serving toxic food until another shock resets her. During Seth's betrayal, she sacrifices herself to hold off his Saurophaganax, enduring a "Fire Scorcher" attack that destroys her. Fellow android Jonathan later retrieves and reassembles her components.

In the second season, she continues servicing the Backlander during time-travel, often in background roles. Key actions include retrieving the Red Cosmos Stone during laundry and discovering the Gel Jarks' weakness to salt. A flashback reveals Dr. Z ordered her kit after failing to bake brownies. She sustains damage rescuing Dr. Z from the collapsing D-Lab but is repaired after the Dark Pterosaur's defeat, joining the crew on the Space Pirate Ship for their return.

A recurring gag involves characters mispronouncing her name as Olga, Thelma, Wilma, or Hilda, prompting her loud corrections.