Misumi Tanaka

The other SDF officer who befriended the children and assumed one of the empty places in Zearth's group. An intelligent and perceptive woman, she is married with a 10-year old daughter. Her surname prior to marriage is Sato, and is actually Jun's mother. She left him with Kana's father (an old teacher of hers) thirteen years ago, as she didn't feel she had the right to raise him herself, thus hides the truth from him. To aid Kana in her battle, and foreseeing a battle outside their home world, she convinced Dung Beetle to allow an advanced fighter jet to be teleported into the cockpit, and used it to shoot down the unmanned fighters deployed by the enemy world's army to help their robot. But in the end she is also shot down and after ejecting, is captured by the enemy robot. Fearing Kana would stop fighting to not harm her, she ends up killing herself with her own gun, just after Jun is told that she is his real mother.

In the anime series, Misumi's husband was a yakuza heir who was murdered by retaliation of his rivals, and left Jun at Kana's father's care, who in the anime is a cousin of hers. She joined the military in hopes to become dependable enough to raise her child by herself until her son was selected as a Zearth pilot and was forced to intervene. Just like the manga, Tanaka dies before having the chance to pilot Zearth, being killed while facing the assassins of Komoda's father, without telling her own son who she was.

Source: Wikipedia