Shakespeare uses various linguistic and literary techniques to develop Iago's character in Act V, Scene 1 of Othello. Iago manipulates Roderigo through repetition of commands and reassurances. His speech patterns change to relate to those he interacts with, showing his ability to manipulate. Iago's public persona as "brave" and "honest" contrasts sharply with his private vindictive nature revealed through violent language. Pronoun shifts from "we" to "I" highlight Iago's self-serving nature, and caesuras used in soliloquies show his arrogance and contempt for others. These techniques illuminate Iago's duplicitous and manipulative character.