役柄 is read as やくがら (yakugara) and means role.
やくがら
yakugara
やくめがら
by virtue of one's office
やくりきし
(member of one of) the top four ranks of sumo wrestlers
やくつきとりしまりやく
executive director
やくにつく
to be appointed to a post
やくにつける
to place someone in a position
やくをわりふる
to assign a role to an actor
やくいんほうしゅう
officer's compensation or remuneration
やくぎ
role
やくそう
priest in charge of a temple's clerical duties
えきむばいしょう
reparation in the form of service
ひとがら
personality
みがら
one's person