Monica Rambeau made her debut within the pages of The Amazing Spider-Man Annual #16 in 1982. Her energy generation, absorption & manipulation powers allow Monica to convert her body into any form of energy within the electromagnetic spectrum and travel at speeds up to the speed of light while in her energy form (including through the vacuum of space). This makes her a pretty tough individual, and she has proven herself to be a capable leader within the ranks of the Avengers.
Unfortunately she seems to suffer an inconvenient name change every decade. She was dubbed Photon in 1996, and was again rebranded as Pulsar in 2005. Lately the former “Captain Marvel” received her latest heroic identity as Spectrum (um, did Marvel forget their other versions of Doctor Spectrum too)? Additional aliases that she has endured are Daystar, Sceptre, Lady of Light, Monica Marvel, and Sun Goddess. Maybe one of these days at least one of these monikers will permanently stick. The character was co-created by Roger Stern and John Romita Jr.