姉

「あ、は、はい・・・ごめん、玲姉」「コラ。幾ら親戚とはいえ、私は先輩医師よ？院内ではちゃんとケジメをつけなさい」

older sister

なるべく姉ちゃんにも周りにも迷惑をかけずに、事態の早期解決をなんとか頼むぞ。

I want you to somehow resolve the situation as soon as possible, causing the least amount of trouble for my sister and those around us.

honorific suffix used after the name of a woman of equal or higher status