The following is a list of characters from Team Umizoomi.
Main[]
| Image | Name | Voice actor | Description |
|---|---|---|---|
 |
Milli | Sophia Fox (Season 1) Madeline Rose Yen (Season 2)-(Season 4) |
The leader of Team Umizoomi and Geo's sister. She is really sweet, cute, and generous. By using her ponytail, she can use as measurement. She used her dress to make their pattern by using powers or peeling off to put it. |
 |
Geo | Ethan Kempner (Season 1)-(Season 3) Juan Mirt (Season 4) |
The fastest member of Team Umizoomi and Milli's brother. He tends to shows his feelings more than the other members of the team, and he's also a bit sensitive. Aside from that, he has a very sparky personality and a "GO! GO! GO!" approach to life. He has roller skates used to make shapes from his shape belt |
 |
Bot | Donovan Patton | The friendly and silly, but smart robot of Team Umizoomi. He is the guardian of Geo and Milli. He can extend his arms and legs. He also has many items, such gadgets, his belly screen and can store anything that the team needs. |
 |
UmiCar | P.T. Walkley | The lovable car of Team Umizoomi. He is their primary mode of transportation and can transform into different vehicles. |