Sol is a cylindrical ship, with no clear cockpit or other defining features aside from the top being slightly separated from the main body.
Sol fires large lasers whose locations are indicated by thin, dotted lines.
Sol starts from the top of the screen outside of the player's view, firing a few lasers. The ship then descends to the battlefield, and utilizes the same attack pattern.
Sol is another word for "Sun." The name choice is strange, as "The Sun" is already an unexpected enemy.