
I'm not 100% but for now I'm gonna believe Griz is not a pedophile.
1. Unknown age - Griz's age hasn't been specified so I think he was probably 1-3 year's older than Towa in the past but is younger now cuz of the difference in time passing
2. Size - it was already mentioned that the men in that world are all really big. Plus Minya mentioned having a teenage son who was bigger than the now adult Towa, so I think it makes sense for Griz to have been bigger while still being close to Towa's age in the past
Past
Towa: 13
Griz: 14-15
Present
Towa: 28
Griz: 18-19
Right now I think it's like this but if Griz turns out to be a pedophile I'm not gonna defend him.