And yes, there are characters currently in the game that will eventually feature in scenes, for example Lady Carolyn from the council will definitely feature in a scene in a future update.
There will be no scenes with Thomas though, that type of content won't feature in the game at all.
Patreon is usually best. Itch > Paypal can be difficult for nsfw-content sometimes, whereas with Patreon it's no issue at all. It also gives direct access to the most recent updates regarding the development, so I think it also offers something in return to those that wish to support the project.