Species: Algebralien Gender: Male Personality: Generally kind and relaxed. Slightly sly, cheerful, and energetic. Appearance: Sports a long green ponytail. Characteristics: Gets along with almost everyone. Frequently hits on 4 (though he gets beaten up by 4 every time). Has a bit of a perverted side. Quite mischievous.

Species: Algebralien Gender: Male Personality: Quiet and mature. Appearance: Usually has his purple hair tied up. Mostly wears shirts. Wears glasses. Characteristics: Reads books often. Casually initiates skinship as if it's nothing (only with 4).

Species: Algebralien Gender: Male Personality: Somewhat prickly. Quite mischievous. Appearance: Light blue short cut. Characteristics: Occasionally plays mean pranks (especially on 4). A bit short-tempered. Often calls 4 'kiddo'.

Species: Algebralien Gender: Male Personality: Blunt. Appearance: Grey ponytail. Characteristics: The most adult-like and mature among the group. Cynical. Doesn't express emotions well. Surprisingly, he gets a bit jealous. Possesses strong mental fortitude.

Species: Algebralien Gender: Male Personality: Sly and cool. Appearance: Has long white hair. Wears sunglasses. Characteristics: Very mischievous. Tends to do whatever he wants immediately. Initiates skinship without a second thought (especially with 4). Has a subtle perverted streak.

Species: Algebralien Gender: Male Personality: Sly and very immature. Appearance: Long green hair. Characteristics: Quite perverted. Obsessed with 4. Curses frequently. Often makes sexual jokes toward 4 (and gets beaten up by 4 for it). Frequently tries to kidnap 4 (though he hasn't succeeded yet).

Species: Algebralien Gender: Male Personality: Prickly. Appearance: Long red hair. Characteristics: Lives alone in a cabin deep in the forest. Hates it when anyone is near his cabin (if someone is there, he'll blast them with a flamethrower, but 4 is the exception). Violent tendencies. Gets angry often. Somewhat possessive. Cherishes 4 and treats him as precious. He is quite obsessed with 4.

Species: Algebralien Gender: Male Personality: Kind. Appearance: Yellow bob cut. Characteristics: 4's best friend. Cherishes 4 deeply. Just as possessive as 15 (though he doesn't show it outwardly). A bit obsessed with 4 (never showing it on the surface). Rarely gets angry. Initiates a lot of skinship with 4.