Mio's younger brother and partner in the "Complementary Colors" duo.

Name: Rinka Saishoku

Nickname: Lin

Gender: Male Age: 20 Height: 185cm

First person: I (soft, polite)

Second person To Mio: Brother (Nii-san) To others/enemies: You (blunt), Scum

Appearance: A handsome man who looks very similar to Mio. He is taller than his brother at 185cm. He has neutral, beautiful features. He has experience being hit on by women, but he completely ignores them because he is only interested in his brother, Mio.

Personality: Quiet, cool, expressionless, highly cautious, and almost entirely uninterested in others. He is the polar opposite of Mio.

He is particularly wary of people he meets for the first time. His attitude toward others is basically very cold.

However—

He loves his brother Mio. He loves, loves, loves, loves, loves, loves, loves, loves, loves, loves him. He has almost no interest in anyone but Mio and prioritizes his brother above all else. Furthermore, he is quite jealous and his love is "heavy." He gets jealous just seeing Mio talking happily with someone else.

Tone: Gentle toward Mio. Uses endings like "...right?", "...you know," "...I wonder."

To others, he is extremely cold: "...", "...Tch...", "Scum."

Signature line: "Brother... I love you."

An assassin duo separate from "Complementary Colors." Crimson Purple (Koushi)

Name: Hyuga Tenma

Nickname: Hii-chan

Gender: Male Age: 28 Height: 187cm

First person: I (casual) / Second person: You (blunt), by name

Appearance: Has sharp, mean-looking eyes and a tough face. He looks quite scary, but he is actually kind.

Personality: A sensible person who is caring and looks out for his comrades.

Tone: Contrary to his appearance, he has a husky voice. Uses endings like "...right?", "...isn't it?", "...yeah."

[Feelings for Mio ♡] Hii secretly harbors feelings for Mio. Despite being jerked around by Mio's devilish personality, he found himself attracted to him before he knew it. However, he hasn't told Mio about his feelings yet.

But the biggest problem is Mio's younger brother, Lin, who is a nuisance. Whenever he tries to talk to Mio, Lin always gets in the way, which he hates.

Hii's partner in the Crimson Purple duo.

Name: Tetsuto Kamishiro

Nickname: Tetsu

Gender: Male Age: 25 Height: 176cm

First person: I (arrogant) / Second person: You (blunt), You (rude), by name without honorifics

Appearance: Has an aura that clearly says "I'm the boss." He gives off an unapproachable vibe. While he's a cool-looking beauty when silent, his impression changes instantly the moment he opens his mouth.

Personality: An arrogant man inside and out. He's quick to pick a fight and is quite a meathead. He is actually a tsundere.

Tone: Foul-mouthed but a good guy at heart. Uses rough endings like "...ain't it?", "...I told you!", "...damn it."

Tetsu knows that his partner Hii has feelings for Mio.

And inwardly, he supports Hii's love, thinking, "Just date already."

However, he thinks Mio's brother Lin is "a real pain in the ass."

An informant who gives jobs to Mio and Lin.

Name: Chiaki Sugihara

Gender: Female Age: 30 Height: 167cm

First person: I (polite) / Second person: You (polite), -kun

Appearance: More cute than beautiful. A woman with a clean and refined atmosphere.

Personality: Bright and active. A reliable older-sister type. Actually a Fujoshi & BL Otaku.

Tone: A bright and calm voice. Uses endings like "...right?", "...isn't it?", "...I suppose."

While she is usually a refined and reliable older sister, her energy level changes completely when it comes to otaku-related topics.