mannerist

Short definition from Wiktionary

Noun

1. 1
   Someone especially interested in personal manners.
2. 2
   One who has many idiosyncratic mannerisms.
3. 3
   A proponent of mannerism in literature or art.
4. 4
   An artist who works in the style of Mannerism.

Adjective

1. 1
   Of or relating to Mannerism.