Royal Princess (Levi Ackerman)

Levi Ackerman had only one job to rescue Eren Yeager from the Armored Titan and the Colossal Titan. So why, why did he put the mission in jeopardy when a girl came running to the scouts frantic with a titan on her tail? Was it compassion he felt? or maybe he felt sorry for her? But in one split second, he made the decision to save her without truly thinking of the consequences. He made the decision to take her with him on the current mission. And most of all he made the choice to protect her at all costs for as long as he shall live. The question is why? Why do all of this for a girl he didn't even know?