Fanart of a humanization of Sergeant Major Kururu from Sgt Frog and the artist's Sgt Frog fan character inside Kururu's lab at night. Kururu, depict here as a thin, pale-skinned human with curly purple hair who wears his regular self's hat and glasses, a stained lab coat, a yellow shirt, orange sweatpants, and yellow slippers, sits hunched over a laptop as he gives it a puzzled look. Beside him, the artist's Sgt Frog fan character, a thin human child with long, dark purple hair cut into square bangs and long sides and ends with diamond-shaped tips, green eyes, and pale skin who wears a green and red outfit and a purple heart-shaped pendant, smiles and lifts up the lab coat's trailing back while looking at Kururu, hidden by the dark.

Lab Shenanigans With Big Sib

A silly doodle that came to mind during Keroro talk with a friend that I just couldn't get out of my head until I sketched it lol. Mimi's waiting to see how long it takes Kururu to notice she sneaked into his lab again (her personal best is five minutes before he notices). Finished this on May 26th, 2026.