Suli Stellamaris or Miss Stellamaris was created by Grant Morrison and Yanick Paquette. She technically appeared in Seven Soldiers: Shining Knight #2 as an image in a poster, but made her first true appearance in Seven Soldiers: Bulleteer #3.
Born under the sea, Suli Stellamaris decided to become an actress in the surface world. At some point she met a lighthouse keeper with whom she had her son, Nepton. During her time in the surface world she became a well-known actress and advocate for the rights of people of marine origin.
Appearing at a convention, Miss Stellamaris hires Big Thunder and Bulleteer as her security. While giving an interview she is mysteriously poisoned, but saved by Bulleteer. Later, following an assassination attempt on Bulleteer she is poisoned again, implicitly by her son.