Arcturus wears a red suit and had red eyes. His skin is a different shade of green than most of the other Martians, and this skin shade is unique to him.
Arcturus was a spy for the Canyon Martians, who were plotting to steal all of the Biodium so Riegel would surrender Mars.
- Arcturus is one of only two martians to have a different skin colour than Dark Turquoise, the other being Riegel.
- He is named after the third brightest star in the sky.
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|Humans:||Assistant | BB | Doc | Mac|
|Martians:||Altair | Antares | Arcturus | Canopus | Cassiopeia | Centauri | Mizar | Pollux | Riegel | Vega | Unidentified Martians|