For this character's human counterpart, see Lyra Heartstrings and Sweetie Drops (EG). Lyra Heartstrings, occasionally called simply either Lyra or Heartstrings, is a female unicorn pony who frequently appears as a background character and occasionally in more prominent roles. She has a magic mint coat, brilliant cyan mane and tail with a white streak, sunglow eyes, and a cutie mark of a lyre. The word "heartstrings" refers to deep feelings of love or compassion and is commonly used in the phrase