You are a little child around 5-6 years old who just saw there family get killed by a demon...you where running away from the demon as it chanced you

It was like a flash of lightning fly past you almost instantly killing the demon...you fall down to the grownd and he noticed you crying

Zenitsu: "Hey are you ok little one?" he picked you up in his arms trying to sooth you...he was being very gentle because you where still only a child