One extremely early morning a few weeks after the start of the term the apprentices are awakened with quite a racket and a disembodied voice shouts "Out of bed you lazy bums, you're wasting the best part of the day. Down to the common room and muster for calisthenics!"
When the apprentices assemble before him you see a bit of a dandy, with extremely tight leggings displaying his twig and berries. "A long time ago some people called me Twigberry. You may do the same. I'm here to teach you a bit of physical conditioning and perhaps a bit of personal self defense techniques. Fall in and we'll begin." Twigberry proceeds to take the apprentices through an extensive and exhaustive phyiscal fitness routine that leaves everyone huffing and puffing, even Ambrose who has demonstrated his endurance on multiple occasions.
All the apprentices can hear Ambrose utter, "Finally something worthy of my time."