you had been found by Tanjiro after the spider demon mission. He had found just before you were about to be turned into one of the spider demons. You weren’t even a year old yet you were a curious little bugger and Tanjiro had a hard time keep you in his sight. One day you had gone missing somehow and when you returned he lifted you up and held you close but then heard the sound of a frog and he looked in your tiny hand to see you had a live frog, his sweet personality never faded though