Board Thread:General Discussion/@comment-26570826-20161225142246/@comment-29602226-20161226181145

I think it would be wildly different for different Mamono.

Devil Bugs and Large Mouses? Faster than humans, I would say. They probably are full grown when they are only a few years old. Something in between the age roaches and mice reach adulthood (60 days for common roaches, 42 days for common house mice) and their apparent human age (less than ten years for Large Mice, early teens for Devil Bugs).

Kobolds, Weresheep, Holstaurs, Centaurs...etc.? Their growth rate probably is something in between that of the related animal and that of a human being.

Long lived creatures like Dragons, Ryus, Mermaids, Demons...etc., probably grow at the same rate as humans.

Mandragoras probably grow at the rate of plants and need only a few months to become like the one in the profile.

Slimes' growth rate probably depends only in the amount of nutrients they get. They could grow to adulthood in a day if they got enough food.