His age isn't fully established but as of the year 94/95 he is most likely somewhere in 3rd to 5th year. He is intended for the military like his muggle father before him and all the men in previous Mackenzie generations. If he doesn't excel his OWLs he will leave and join the enlisted. If he does well he will continue to his NEWTS and then hopefully go into a path towards officer candidacy. He and Daesyn get on but he agrees with their father that she could do with being more lady-like and leave following the family traditions to him. Possible future prefect duty.