@VermillionOcean
That was 5 years since he was beat up by the old dude and his daughter. By that time his children were already pretty big and able to walk and talk and even wanted to do martial arts with their dad. I wouldn't be suprised if they were around 4 years old.
By the bodyguard I meant the guy in the black cloak with a skull mask. I'll go see if I can find some chapters with him in now if you want
Edit: He's seen protecting her in chapter 9 and 10 as a child, and then he speaks to her as an adult in chapter 135.
He also appears in chapter 140 speaking to the powerful dude who is the master of the old twin masters and the father of the rich kid Noh once saved and who I suspect is the guy Noh has a trauma from being beat up by before the story started.
I think the bodyguard might be in some other chapters, but I can't be bothered looking through them all