Miwa Tanaka

Miwa Tanaka is a female ninja and a major character in The Dawn of Monster Kid. She is a ninja superheroine, and the biological mother of Cora Stewart, Ami Tanaka, Miko and Akiko.

Biography
Miwa Tanaka was born in Tokyo as her family has been part of a ninja clan known as the Dragon Clan. At some point, she joined the Planet Warriors and fell in love with an American man named Tim Mason, who's one of Avalon's top agents with and got married. Years later, Miwa gave birth to four girls, Ami, Akiko, Miko and Cora. When Dragon Cove was attacked by a monster called Vexon. Miwa and the Planet Warriors as well as Avalon battle the creature while Cora was under the care of Mary and Harold. During the battle, Vexon fired an energy beam at Miwa's jet, causing her to crash into the city bay as the jet explodes in the water, presumably killing Miwa in the process. However, she managed to survive and saved by members of her clan. Since her disappearance and the death of her husband, her children were adopted by other families. Overtime, she watched them from behind.

The Dawn of Monster Kid
In season 3, Miwa learned that her father had sent ninjas to attack Cora and was furious. Yoshida explains his reasons was to test out Cora's skills.