With Bella's birthday not far in the horizon at the time of this writing, I thought it prudent to repost C-chan's drawing for her 2008 birthday. Except for the larger size, it is reposted entirely in its original form.

The drawing is a full-body portraiture of OpenVMS-tan, a powerful swordswoman and geomancer who used to be one of the most capable DEC officers, but now heads an influential OS-tan faction called the "CIOST" (or "Confederation of Independent OS-tans"). Aside from the leader, she is also the captain of an enormous submersible that serves as the CIOST headquarters, and in which the current setting takes place. She is also a passionate admirer of sharks and keeps a few in a non-isolated tank as free-range pets. The large cleaver she wields is decorated/sharped along the bladed edge by steel-coated shark teeth.

Being silent and withdrawn, she customarily wears a mask while in public, but is pictured here taking it off. Any slight similarity with Windows NT-tan is, of course, intentional.