Erika Satonaka

Erika Satokana (里中 エリカ, Satonaka Erika) is Kosei Kougami's able and beautiful secretary. Later, she becomes Shintaro Goto's assistant when he takes over as Kamen Rider Birth.

Personality
Erika is a mature young woman who is never bothered, with a calm disposition, even when her boss makes her eat his cakes all the time (though she actually enjoys spicy food better). Because she is always made to eat the cakes that Kougami makes, she always has dieting on her mind.

Overview
Erika often leaves the chairman's office to assist Shintaro Goto in information gathering or to speak to Eiji on Kougami's behalf (though she actually outranks him). Later, she becomes Goto's assistant when he takes over as Kamen Rider Birth, but is lazy and causes trouble for him - showing up late to battles and sending a Gorilla Candroid to assist him in her place.

But in episode 40, Erika becomes a bit more reliable when Shintaro agrees to pay her five percent of his salary to be ready for battle against the Greeed immediately. However, she still causes him grief by throwing him only one spare clip of ammunition for the Birth Buster.

Kamen Rider Birth
Statistics Ability Perimeters:
 * Height: 199 cm
 * Weight: 92 kg
 * Punch power: 3.5 t
 * Kick power: 8 t
 * Jump power: 45 m
 * Speed: 100m/5s

She only transforms into Kamen Rider Birth in Net Movie: Kamen Rider OOO Allstars: The 21 Leading Actors and Core Medals.

Like Kamen Rider OOO, Kamen Rider Birth's powers stem from the O Medals that power the Greeed and their Yummy creations. However, Kamen Rider Birth's powers originate solely from the Kougami Foundation's technology developed by Kiyoto Maki to utilize the power of the Cell Medals. On Birth's armor there are capsules called Receptacle Orbs (リセプタクルオーブ, Riseputakuru Ōbu), in which the Birth CLAWs system is installed in until a Cell Medal is used to summon the weapons. However, due to using Cell Medals as opposed to Core Medals, Birth was at a disadvantage against a single Greeed. Kamen Rider Birth's exosuit has originally a self-destruct function built into it. However, the self-destruct function has been disabled by Shintaro Goto when Kiyoto Maki defected to the Greeeds' side.