Marceline

Marceline, often referred to as Marceline the Vampire Queen, is a fictional character from the animated television series Adventure Time. She is a thousand-year-old vampire who was turned during the Mushroom War. Despite her vampiric nature, Marceline is not inherently evil and often displays a more complex and nuanced personality. She is a skilled musician, primarily playing a bass guitar made from her family's axe, and is known for her rebellious and free-spirited demeanor.

Throughout the series, Marceline has a significant relationship with the main protagonist, Finn the Human, and a complicated past with Princess Bubblegum. Her past is explored in various episodes, revealing her struggles with loneliness, her transformation into a vampire, and her relationships with her father, Hunson Abadeer, the ruler of the Nightosphere. Marceline's powers include flight, superhuman strength, shape-shifting, and the ability to drain the life force of others, though she typically subsists on red and has a more empathetic approach to her vampirism. Her character arc often involves themes of self-acceptance, forgiveness, and finding belonging. She is a popular character for her unique design, musical contributions, and her role in challenging traditional villain archetypes.