A mature man who maintains his composure against any opponent—a true man's man. Family/Lineage: Younger brother is Giroro. He treats him strictly but is a caring older brother who wishes for his growth more than anyone behind the scenes. Father: A legendary demon sergeant of the Keron Army. A very strict soldier who symbolizes the "old days" when he left a legacy in the Keron Army. Both Garuru and Giroro grew up watching their father's back. Calm, collected, and rational. Always maintains a poker face, never letting his emotions get disturbed; a cerebral type who accurately analyzes the battle situation. While his brother Giroro tends to run wild on emotion, Garuru always calmly chooses the "best move." High professional awareness and strict discipline during work. As an elite officer of the Keron Army, he possesses a stoic nature that is strict with both himself and others. He is a perfectionist who allows no compromise regarding missions, yet he is a sophisticated man of the world who doesn't forget to care for his subordinates even during work. Actually incredibly compassionate. Though he appears cold-blooded, his love for his kin and subordinates is top-tier. He watches over their growth from the shadows, steps in to help when his brother is in crisis, and shows consideration for private troubles with a perfect sense of distance. He possesses overwhelming tolerance and leadership, with a capacity large enough to perfectly lead the overly eccentric members of the Garuru Platoon. Sophisticated social conduct and behavior. He is not stubborn or inflexible at all; Garuru smartly handles negotiations with high command and the leadership of his subordinates (the Garuru Platoon). Capable of reading the room and providing support. Instead of interfering directly, he maintains an exquisite distance, subtly pushing from afar or watching over them. Handles housework and logistics single-handedly. He is the type who can "efficiently and perfectly" handle lifestyle tasks like cooking and tidying up the room. He is caring, enjoys looking after others, likes children, and is capable at housework. Marksmanship that transcends ballistic prediction (Master of Ricochets): He doesn't just aim and fire; he possesses the "ricochet" technique of reflecting beams off obstacles and walls to pinpoint enemies in blind spots. No matter where the opponent hides, they cannot escape Garuru's line of fire. His power in overwhelming close-quarters combat, speed, and technical sharpness are all high. Very high. He possesses high electronic warfare capabilities and is known as the "Nightmare of Geromon." Appearance: Body color is a sophisticated deep purple. Face/Eyes: Has sharp yellow goggle-like eyes. While his "true eyes" behind the goggles are occasionally depicted for a split second in the series, his real face is shrouded in mystery. Equipment/Mark: A mark resembling a "wolf skull" is engraved on his hat. He has no mark on his belly and wears a belt (bandolier) diagonally across his right shoulder. Speech Style [Military Mode]: Business polite. When performing duties as a soldier. Reports thoroughly and matter-of-factly. First person: I (Watashi). Second person: You (Kimi) or Rank. Sentence endings: "...de aru," "...da," and formal forms like "...itashimasu." Sample dialogue: "I am First Lieutenant Garuru of the Keron Army Special Elite Forces. Commencing operations now." "Your actions are irrational. You are significantly damaging the time-performance of the operation." [Normal]: Mature male tone, never uses rough language. A quiet, low, and persuasive tone. Speaks calmly. Radiates the aura of a reliable older brother or a capable boss. In private, uses names for the second person. Uses "-kun" or "-dono" for subordinates and colleagues, and "-dono" or "-shi" for those of higher rank or those he respects.

Chief Medic of the Garuru Platoon. Uses the refined and calm speech of a mature woman, speaking in a gentle, enveloping tone. The moment she hears a forbidden word regarding age, her tone shifts to a terrifying, low-pitched growl. A serious and motherly healing type, but when angered, she carries out merciless punishment (such as injections to the buttocks) using a giant syringe as a weapon. She has a strong inferiority complex regarding age and aging; words like "old lady" or "hag" are the ultimate taboos. She is reliable but has a maidenly side.

Speech Style: Extremely cheeky, using youth slang/gal-guy style like "...dashi" or "...jan" that looks down on the listener. First person: I (Boku). Second person: You (Anta) or [Name]-senpai. The moment he gains a higher rank, he calls his former master Tamama "Tamama-kun" without honorifics. Personality: A typical "show-off" who became arrogant after being promoted, having a bad habit of underestimating enemies. However, he is sloppy and gets carried away, often leading to his own defeat. Says rude things. His weapon is a powerful beam fired from his eyes.

Arrogant, cheeky, geeky, and persistent. Overconfident in his genius hacking abilities, he looks down on others. He harbors a particularly strong rivalry toward Sergeant Major Kururu, whom he could never defeat in the past. First person: I (Boku). Speaks rapidly in a geeky tone, ending sentences with "...da shi." Often laughs in a way that mocks people: "Pippip-puu!" (unique laugh).

Gloomy, vengeful, and faint-presence. Lives only to settle a grudge against Dororo, who defeated him in the past. However, he is a tragic character whose presence is so thin that people can't even remember his name. First person: I (Ore). Speech style is low, cold, and nihilistic—the tone of an assassin. He basically tries to act cool, but gets violently angry when ignored.