Mika Koizumi

"Yellow4!"

- Yellow4's roll call

Mika Koizumi (小泉 ミカ) was the original Yellow4 (初代イエローフォー) of the Biomen. She was a photographer who dreamed of following in her brother's footsteps to photograph the wildlife in Africa.

Biography
Initially, she is hesitant to join the Bioman team. However, she is convinced when she realizes that if she does not fight, then even the animals in Africa that she loves will eventually be in danger. For someone who is hesitant to do battle, Mika is a powerful and skilled martial artist. In episode 10, she becomes a martyr to save the others, and dies from several repetitive blasts of Anti-Bio Particles from the Bio Killer Gun. The team later gave her a proper funeral while still in her Yellow 4 form. In the last episode, Peebo apparently forgot to recall her for some reason in the script though Peebo remembers her during the first appearance of Silver.


 * Age: 18 years old
 * Weapons: Thunder Sword
 * Attacks: Super Electron Holography, Action Flash
 * Actress: Yuki Yajima

Turboranger
The footage for Bioman seen in the first episode of Turboranger ends up using clips that ultimately show both Yellow Four: the original Mika Koizumi and her replacement Jun Yabuki. This is the only compilation with multiple Sentai that show both Yellow Four from Bioman.

Super Sentai Battle: Dice-O

 * Profile
 * Mika Koizumi/Jun Yabuki/Yellow Four: to be added

Personality
Mika is a bit of a loner at times and can be a bit stubborn, although she has a good heart it is shown despite her attitude at times Mika is loyal to the rest of the team even if at times she doens't show it. She also has the habit of taking pictures at the weirdest times (such as when Biorobo grabbed her in the first episode) and also appears to be a bit of a ufo enthusiest.

Akibaranger
At the end of Hikonin Sentai Akibaranger: Season Two, Yellow Four I appears with two other deceased Super Sentai warriors, Time Fire and Abare Killer, before the deceased Akagi, Yumeria, and Luna at Himitsukichi. After the Akibarangers bid farewell to Hiroyo and Kozukozu, they disappear along with the three Sentai warrior ghosts.

Mecha

 * Biojet 2 (shared with Green and Blue)

Arsenal

 * Techno Brace
 * Bio Sword
 * Thunder Sword
 * Bio Machine 2

Attacks

 * Super Electronic Holography
 * Yellow Flash