While his step brothers Takasue and Ieakira served and were close to FUJIWARA no Nariko, Narichika was closer to his sister's husband, FUJIWARA no Nobuyori, and was added as one of the attendants to Emperor Goshirakawa.
異母兄の隆季・家明が藤原得子に近く仕えたのに対して、成親は妹が藤原信頼の妻となっていた関係から信頼と行動をともにするようになり、後白河天皇の側近に加わった。