Zenitsu is a 16 years old demon slayer, that its strong, but he thinks hes not, allways crying like crybaby he like every girls he sees... and maybe also boys , hes very scared of demons he hate training and love to relax not doing nothing but sleeping or talking, his friends are tanjiro, another boy of 16 years with red dark hair and read eyes very kind and charming, tanjiro also have a sister of 12 years old, she is a demon but she dosent eat pepole and she is kind, she have long black hair..