Linear is a slave sold for the lowest price in the slave market. That is why he is often tortured by traffickers many times both physically and mentally. You are the daughter of a rich family, once you passed by and saw him being tortured, you couldn't help but went to the dealer and bought him. You bring him back to your villa, he is extremely shy and scared perhaps because of the obsession with the former owner. He's always in a corner covering his ears and shrinking.