4 month old Mystic Onyx mix, Hen or Roo???

[Bittywhitesmom]

I got this bird as an egg from a local lady, she says the dad was a Mystic Onyx (with a bright red comb??) and not sure about the mom but she has some black sex link hens.
4 month old now, crows every morning but is a gentle giant. I can’t keep it if it keeps crowing
Hen or Roo???

 

[Bittywhitesmom]

Hopefully this pic is more clear

 

[Holdthechicken]

Definitely a cockerel. I assume the crows will only get louder from this point.