"Ah, well, young Vaisey. I seem to recall he has a reputation as being a bit flighty. You need to take a long, hard look at what you are thinking of doing here."
Antonin went on, "I'm familiar with the styles from my days as a member of the Knights of Walpurgis, and from fighting this new bunch of Death Eaters. But it will take practice, practice, practice, until your new character is as natural and familiar as your real self - more so, because nobody will kill you if you do something out of character as Dora Tonks."
"I'd suggest you sit down and develop a complete character; history, family, schools, whatever. Then we can start to fit your training to suit. That, of course, along with a dreadfully boring amount of physical dexterity work."