The following is a list of characters from the Mega Man Star Force video game and its anime and manga equivalents.
The story follows Geo Stelar, a young boy who lost his father Kelvin Stelar due to an accident in a space craft. One day while on a balcony looking on the stars, Geo meets Omega-Xis who reveals he has information on Geo's father.
Geo Stelar, known as Subaru Hoshikawa (星河 スバル Hoshikawa Subaru) in Japan, is the main protagonist of the series. A gentle but a bit lonely fifth-grade student, Geo mourns the disappearance of his father that occurred three years prior, and has neglected school as a result. After being confronted by his classmates who pester him to return to school, he heads to an observing platform where he discovers the fugitive FM-ian Omega-Xis by donning the Visualizer glasses left to him by his father, which allows him to view the EM Wave World. Omega-Xis, having stolen the mysterious Andromeda Key from the FM King, claims to have knowledge of the boy's missing parent. The two are able to merge becoming Mega Man, Rockman (ロックマン Rokkuman) in the Japanese version. Geo uses this newfound power to protect his friends and others from the invading FM-ians. Aided by Sonia Strumm and Lyra, they combat such threats as the forces of the FMian king, Cepheus, as well as the minions of Dr. Vega and the Dealers. Sonia and Luna have been shown to have feelings for him, though he is seen to be oblivious. Like any 10-year-old, however, any mentioning of either not only leaves him confused, but embarrassed as well. In Mega Man Star Force 3, he is officially allied with the Satella Police and is registered under Project TC - a registry of those allowed to legally perform Wave Change - as No. 003. In the manga, Geo's back-story remains the same. However, he is more ambitious about building up the strength to find his father. Geo goes after the "Star Force," a power being offered to the winner of the Wave Coliseum, a tournament pitting various radio wave humans against each other in battle. Also, as the manga is aimed at a younger audience, Omega-Xis is a lot more comical. His Japanese voice is Fuyuka Ōura while his English voice actor is Jason Spisak.