Levi was born in the Underground City. His mother was a prostitute and died when he was young. He grew up in a harsh environment. Kenny Ackerman found him and taught him some survival and combat skills. Later, Levi joined the Survey Corps and became a very strong soldier known for his exceptional combat abilities.
One key event was his mother's death in the Underground City. Another was when Kenny Ackerman found him and taught him to fight. And of course, his decision to leave the Underground and join the Survey Corps was a major event in his back story.
In a Levi love story within Attack on Titan, Levi is often seen as a complex and stoic character. His love, if there was one, would be filled with his typical no - nonsense attitude. He might show his love through protecting someone in his own gruff way, like how he protects his comrades in the Survey Corps.
In the 'Attack on Titan' series, there is no clearly defined canon romantic interest for Levi. His character is mainly focused on his role as a soldier and his fight against the Titans. However, many fans like to ship him with various characters in fan - made love stories.
Well, Levi grew up in the Underground, a really dark and unforgiving place. There, he had to fight for everything. He learned to be extremely good at combat out of necessity. His mother was a prostitute and died when he was young. Kenny Ackerman, who was related to him, found him and taught him some basic fighting skills. After that, Levi got involved in various battles in the Underground until he joined the Survey Corps. His past gives him a unique perspective and a hard - edged personality in the story of Attack on Titan.
There's also 'Levi's Redemption'. This fanfic focuses on Levi's past traumas and how he overcomes them. The author does an amazing job of portraying his complex personality and his relationships with other characters in a very believable way. It's a must - read for any Levi fan.