Koutarou Tatsumi

Koutarou Tatsumi is one of the main characters from the Zombieland Saga anime.

Koutarou is the energetic producer of the idol group Franchouchou. He's the one who resurrected the girls from different eras as zombies to be part of his idol group.

In the Heroes Coalition fics, Koutarou attends Vanguard Academy as a student.

Appearance
Kōtarō is a young adult man with a tidy combed hairstyle, he wears sunglasses and a formal attire. Kotaro always has dried squid in his vest pocket.

Personality
Tatsumi is a loud and eccentric idol producer who has big ambitions for "saving" the Saga prefecture with his zombie idols. He is unwavering and passionate when it comes to achieving this goal, doing whatever it takes to make the girls into a sensational idol group.

Though he may have lofty motivations, however, Tatsumi himself seems to be quite an idiot and often pretends to be more knowledgeable than he actually is. When his ignorance is ever revealed, he often resorts to lashing out and yelling at whoever called him out. He rarely ever takes into account the girls' feelings about his ill-conceived and unreasonable plans, such as forcing Sakura to perform in front of a crowd of death metal fans when she explicitly told him that she couldn't.

Despite his flaws, Tatsumi does seem to have some semblance of wisdom and understanding, telling off Ai and Junko for giving up on the idol group so easily, which would eventually help convince them to join the group. Another time, when Junko locked herself up, he gives her advice on her issues with modern idols. He also shows this side by demonstrating a fair amount professionalism as a manager such as creating various business opportunities and connections and lecturing how Saki's actions in a fight could potentially ruin Franchouchou's reputation.

Abilities
Despite his eccentric personality and abrasive behavior, Kōtarō has displayed numerous skills.

Necromancy
Kōtarō seems to have some kind of skill in a form of necromancy, as he brought the 7 members of Franchouchouback to life as zombies. More than that, it's implied he had some way to restore signficant portions of said members as most of them were damaged to critical levels (Lighting scorching -Ai-, explosions -Saki, Junko-) or literally rotted away (Yūgiri, who died 100s of years ago) but not fully as scars, skin colour and detaching limbs are still present.

Make-Up Artist
Thanks to the skills he acquired in Hollywood he is able to make the zombies look like normal girls. Most likely beyond the normal level so that some of the skill may be due to his Necromancy.

Music Composition
Kōtarō is knowledgeable in music composition, as shown in episode 8 when he is at a Piano helping write "To my Dearest." It is likely he composed the rest of Franchouchou's songs as well.

Beatboxing
It is shown in Episode 2 that Kōtarō has significant skill in beatboxing, as he did the main beat to fuel the rap battle between Sakura and Saki, and was able to quicken his beat immediately when Yūgiri joined in playing her Shamisen.

Charisma
Kōtarō has been shown to be able to woo both male and female characters into doing what he wants. Such as the older woman and the boss of the chicken shop.

Supernatural Strength
Kōtarō proved himself extremely powerful for a human being, capable of casually overpowering zombies and breaking blocked doors with simple kicks.

Trivia

 * Despite being so charismatic, Kōtarō seems to have a fear of public speaking as seen during Episode 5 when he was asked to address the crowd at the Gatalympics.
 * Tatsumi means "southeast" in Japanese, while Inui means "northwest."
 * When Tatsumi and the barman were discussing the Zombieland Saga Project, the pub they were in is called the New Jofuku.
 * Jofuku is the Japanese name for Xu Fu, a court sorcerer during the Qin Dynasty who was sent to take the elixir of life from the immortals. The pictures on the wall of the bar are of Jofuku park in Shingū.