pick up on
phrasal verb
pick up on something
1 ​to notice something and perhaps react to it
She failed to pick up on the humour in his remark.
2 to return to a point that has already been mentioned or discussed
If I could just pick up on a question you raised earlier.
pick somebody up on something
​to mention something that somebody has said or done that you think is wrong
I knew he would pick me up on that slip sooner or later.
e.g.
/fe3hdialogue/Dimitri×Flayn#61238aa5bdb0e50000440ccc
/fe3hdialogue/Caspar×Dorothea#613cb93bbdb0e5000051d81f
/fe3hdialogue/Sylvain×Lysithea#63c0c880bdb0e500008e64fd
/13sardialouge/最終エリア#62a42d71bdb0e50000524e77