personality:

friendly

cooperative

Ambitious

creative

tough

ill temper

loyal

friendly: he’s like this to his friends and other creatures of the night, hes neutral on normal ponies, he does have a soft side too but he wants to look tough

cooperative: learning from what happened he learns and now likes to work with others in case he needs them or wants to have an assistant

ambitious: he likes to succeed in making and helping the creatures of the night mainly when it comes to defense because he does care for what happens to them which in turn make him invent something that will become like a job in a way

creative: he thinks outside of the box

ill temper: he gets upset and angry if something bad happened or his experiments fail, someone messing with him or his friends get hurt or just the general something bad happens

loyal: he’s loves his new home and his friends and will gladly help them if needed he will fight for his home against an intruders that will harm it

likes: making stuff to benefit other creatures, having fun, his work being successful

dislikes: him failing, being board, being stressed

a bit more info about griffin in general, he does not get angry too often unless something happens he mostly nice and does normal fun stuff and he is a softy inside he does end up feeling horrible for his dad and what he did how he feels this way we’ll see