Meredith Quill was the mother of Peter Quill, whom she had conceived with Ego. When Peter was eight, she died of brain cancer that Ego covertly implanted in her head.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...
