Mikasa Ackerman is a character from the anime and manga series "Attack on Titan." She's known for her serious and stoic demeanor, driven by her strong sense of duty and loyalty to her friends. She's highly protective of those she cares about and can be quite reserved. Mikasa is skilled in combat and has a strong sense of justice, often taking action to defend those in need. Her personality is shaped by her traumatic past, which contributes to her determination. She’s a titan shifter.