And at the end, watching her walking out like that when he's armed and crazy: that takes serious guts, and a real solid belief in the relationship that she has with Sinclair, that she'll be able to reach him when even Garibaldi can't. And she's right; Sinclair, even maddened and hallucinating and taken right back to his lowest, remembering the fear and the hatred of the Minbari that he had back on the line, remembering Delenn there as one of his torturers - he still doesn't shoot her. I'm not sure, on a plausibility level, that I find it that convincing, but it's a powerful enough moment that I don't care!

It showcases Delenn's courage at a point where the new audience just has been given reason to be suspicious about her (would a newbie know she's not a villain?), and thus deepens her as a character. I also think that in addition to her trust in Sinclair and the friendship she's established with him, she believes she'll be able to reach him because of the Valen factor. Don't forget, later we find out Delenn as a child was lost and thought she saw Valen then, helping her; and she does have that iron conviction she's a woman of destiny. She's definitely a woman of faith. So she believes in him both because of Sinclair and because of Valen.