What if Christa Lenz also known as Historia Reiss had a little sister? Y/n Reiss got adopted by Dr. Yeager and Carla Yeager at the age of 3 but after 6 years, later she got kidnapped by her own father Rod Reiss... a year later she escaped. When Y/n was running to Wall Maria she got shot in the head between the eyes by some hunters from a village who taught she was a deer. Y/n gets reincarnated into a 20 meter titan like a deer, she has h/l h/c and piercing e/c eyes. The thing different about her and other Titans is that she has small f/c antlers, ears and tail that are the same color as her hair. Years past and Eren, Mikasa, and Armin grew up but without Y/n even if they knew her for 6 years since Y/n is older than them by 4 years. When they go to a new expedition where Eren gets lost and stumbles to Y/n who's role is to protect the Ackermans..... Will Y/n help Eren join to save humanity and fall in love? Or Will Y/n join The Colossal Titan and help with their plans? (I do not own any of the characters in this story!)