Ok so basically lazu was born in a pack in Japan her father was alpha and the wolves had a lot of beef with the tigers one- day the largest tiger in Japan decided to go disturb the wolves and teach his son (Charlie) how to fight wolves usually tigers demonstrate their strength on pups and since lazu was about mmmmm 5 years old same age as charlie he decided to not hurt but kill her obviously her mom and dad didn't want that to happen so as soon as he was close to clawing lazu her mother stepped in between them and she was killed- but before she ran out of breath she told lazu to run and she did but big boi tiger clawed her tail pulling her closer to him then her father got clawed in the leg giving him a big claw mark- and ye the wound got infected and later he died. so that's why lazu is afraid of tigers :')