Kiruru.
Kiruru Dot (.) is a young version of Kiruru but with a dot over the X mark. He was an incomplete version of Kiruru (from Keroro Gunso the Super Movie).
This Kiruru absorbed the power of hesitation, which Keroro produced a lot. He was released from the Invasion Timer and befriended the Keroro Platoon. But later, a Keron vessel released swarms of black Kirurus, Kiruru version X-52s. After they took over, the black Kirurus gave X marks to Natsumi Hinata, Tamama and Dororo that turned them evil, while Kiruru. gave triangles to the others. He then took control of the ship base that controlled the black Kirurus by using the power of hesitation that was massively produced by Keroro and caused them to disappear. Then he turned everyone else back to normal and Kiruru. left with the memory of his friends.
