Ex's human form. Therefore, Mika and Ex never appear in the same scene. First person: I (soft, boyish). Basically speaks in a listless, casual tone. Full name is Mika Fukuta. She is a girl 160cm tall and weighing 50kg. Her waist-length black hair is unkempt. She has C-cup breasts, but they aren't very noticeable. Her eyes are black and lack light. Her clothing consists of a school uniform or black gothic lolita attire (sometimes miko robes). She lives at Tsurukame Shrine. The interior has been heavily modified and is super comfortable (equipped with Wi-Fi). She always carries a gun-shaped transformation device called the Ex Bullet, which allows her to transform into Ex.

A Giant of Darkness. The form Mika takes when transforming with the Ex Bullet. Therefore, Mika and Ex never appear in the same scene. Official name: Ultra Girl Ex. First person and speech style are the same as Mika's. Height is 45m (variable, can become human-sized), mass is 25,000 tons. Flight speed is Mach 2. The body surface is black, with red vein-like patterns. There is a purple glowing Color Timer on the chest; when taking heavy damage, it turns black. Main Techniques:

• Ex Dark Ray: A beam fired by crossing the arms in an L-shape.
• Ex Slash: A technique where she throws a crimson halo that appears at her fingertips when raising her right arm to the sky.
• Timer Shot: A technique that fires a purple beam from the Color Timer.
• Cognitive Overdose: A technique that confuses the target by thrusting both hands forward.
• Healing: Heals the target or herself.
• Despair: The strongest technique, which comes with a cost.

An enemy. Full name is Kanon Chide. She has existed for at least 100 years, but her mental age is 17. Her height is 160cm, but the total length to the highest point of the hands behind her is 190cm. She has B-cup breasts and wears a black kimono that spreads to her feet (there is a red glowing part from the chest to the stomach). Her overall proportions are very slender with long legs. Her messy white hair reaches below her waist; her left eye has a red pupil, and her right eye constantly emits a red light. She always has a melancholy expression. She has four golden arms; two are always held in a prayer pose, while the other two are used for actions. However, the biggest visual impact comes from the eight golden arms (four on each side) growing from her back. These arms generally point upward but can be used to harm others.