get into someone’s skin —(coll.) come to a complete understanding of smb.’s inner nature (impersonating a character, etc.):
- In the church scene, Miss Rehan won her audience … but she never really “got into the skin” of Beatrice.
get under someone’s skin —(coll.)
1. bother or irritate a person:
- John is so annoying at times. He really gets under my skin.
2. affect a person so that he becomes very interested in smth.:
- After a slow start, the play gets under your skin because of its sympathy with the frustrations of small town life.
3. = get into someone’s skin:
- I think you are interested in—character, shall we say? To get under the skin, as it were, of your criminal.