In season 2, episode 19 “Divided Loyalties”, CDR Ivanova confesses to CAPT John Sheridan of her telepathic abilities.
IVANOVA: I'm a latent telepath.
SHERIDAN: Susan, why didn't you tell me this before? I though we could trust each other.
IVANOVA: It 's got nothing to do with trust. I've spent my entire life hiding this, Captain. It 's not something you can just change overnight. It 's hard enough telling you this now.
SHERIDAN: You're right. I'm sorry.
IVANOVA: For as long as I can remember, my mother drilled three words in to my head: ‘Tell no one.’ She taught me how to fool the tests given at school, transferred me from one school to another — always staying one step ahead of the Psi Corps. I'm probably not even a P1: I've never been able to read anyone except my mother; I can pick–up on feelings, sometimes; I can block a casual scan — and I know instantly if someone 's doing it. Nothing more.
What are the examples, as given in all of the canonical Babylon 5 stories, which seem to demonstrate or hint at Susan Ivanova using or having those abilities?
I would consider messages posted by J.M.S. to Usenet and which reveal otherwise undramatized character or backstory as canonical.