Sonar (Comettor in English version) suffers heavily from wanderlust. He hates staying in one place for any length of time, and loves exploring, especially the astronomical wonders found in the vastness of space. There's nothing he'd rather do than journey through the stars with his spacefaring partner Jetfire, cataloging deep-space phenomena... but the war with the Destrons tends to keep Jetfire—and therefore Sonar—stuck planetside. This often sends the inquisitive Micron into a deep personal funk, much to Jetfire's dismay. Sonar tries not to let it affect his performance, and it usually doesn't... but Jetfire knows that it's eating him up inside, and does what he can to help his friend through it. (Source: TF Wiki)