Discussion after the film will be led by Theresa Wolfwood, and longtime peace activist.

Source: https://www.lakecowichangazette.com/community/coming-up-in-cowichan-a-film-and-a-bevy-of-speakers/

The priest introduces himself as Nicholas D. Wolfwood, and Vash finally eats something, probably due to Wolfwood's influence throughout the course of the day's events.

Source: https://gamerant.com/trigun-stampede-episode-4-review-enter-the-priest/

We are talking about the one and only Nicholas D. Wolfwood, of course.

Source: https://comicbook.com/anime/news/trigun-stampede-anime-wolfwood-hot-guy/