Sid is a thin yet muscular man about the same size as his captain, with wild and a bit outgrown blue hair. His common attire before the timeskip consisted of a navy blue T-shirt with a white, unbuttoned button up shirt on top of it, with plaid pants held in place by a belt along with dark black shoes. During the Strong War Sid wore a very similar outfit, though this time all but the very top buttons of his shirt were fastened, showing much less of the T-shirt underneath. After the timeskip, Sid wears a dark blue version of a Japanese schoolboy's outfit, and his hair appears to have grown out a tiny bit.