Well what if one parent was a Crab bushi and magistrate working with a Dragon investigator.  The two are investigating a conspiracy and maybe not fall in love but had a love child, your character.  She carries the child in secret and gives birth in secret because the conspiracy is getting deeper and more dangerous.  Eventually they decide to leave their child with a family friend of one of them.  They both claim a honorable leave to investigate more and disappear.  Family friend is told not to reveal the child's heritage but then dies of "mysterious" causes.  A loyal servant that is a Ronin takes the child and eventually they end up with a band of ronin that decide on the 20 goblin winter.