Доброго времени суток!
Кто может подсказать момент по канону. #HP
У меня отложилось в памяти, что в первой книге старостой был Перси (будучи на 5 курсе), а кто его сменил не сказано. Только в 5 книге назначают Рона и Гермиону.

На англ. ресурсах вообще написано что каждый год, на каждом пятом курсе выбирают старост.

A prefect at Hogwarts School
of Witchcraft and Wizardry is
a student who has been given
extra authority and
responsibilities by the Head of
House, Headteacher. One
male and one female student
are chosen from each house
in their fifth year to act as
prefects, and would continue
to be prefects in their sixth
and seventh years until they
leave school. Thus, there are
approximately six prefects per
house, and twenty-four
prefects in the whole school
at one time. The Head Boy
and Head Girl may be chosen
from among this number and
may not be replaced, but, like
with James Potter, the Head
Boy or Girl does not have to
be a prefect.