A person you consult with—someone you can confide in or ask for advice about problems or work.
何かあったら相談相手になってくれる友人がいると心強い。
It's reassuring to have a friend who will be a相談相手when something comes up.
仕事のことで悩んだら上司を相談相手にしてみよう。
If you have work-related worries, try making your boss your相談相手.
家族は私の一番の相談相手だ。
My family is my primary person to consult/confide in.