Meowdar is a young resistance fighter from the war-torn planet La Metal, orphaned by the conflict between biological humans and mechanized beings. He possesses orange hair and cyan eyes. During a battle on his homeworld, he befriends Tetsuro Hoshino while aiding rescue operations. Meowdar carries his deceased father's musical watch, a keepsake and reminder of his past. He shares rumors with Tetsuro about Maetel potentially replacing Promethium as ruler of the Machine Empire. Together, they explore ancient castle ruins on La Metal, discovering a portrait resembling Maetel, later identified as Queen Prometheum.

After Tetsuro leaves, machine forces capture Meowdar. He is transported aboard the Ghost Train to Great Andromeda, capital of the mechanized empire, and imprisoned in an energy farm. There, living humans are drained of their life force to power machine beings. Tetsuro later finds Meowdar among the deceased in this facility, alerted by the sound of his watch, revealing the mechanized civilization's horrific energy-draining practices.

Following Great Andromeda's collapse, Tetsuro recovers Meowdar's body and returns it to La Metal for burial.