There is, in fact, a section dedicated to Discord roleplaying found on the Roleplayer Guild Discord called #in-character_roleplaying. The issue with it hardly being in use as it is, is because the majority of the audience on the server now go there to have interaction with the community outside of roleplaying. The option however, always remains, and it typically becomes active when the forum is experiencing downtime due to maintenance or outages.

If one wished to do so, they very much could assume the channel by and large and play to their heart's content, with the same sorts of protections afforded to the forum - meaning problem players can still be enforced against - all while having a foundation to base the roleplay topic off of. One could, should even, create a topic as normal and simply play as they will in the Discord's appropriate channel. As it is, the only issues with terms of quality or ability are really limited to the persons involved, not so much the chat service. While it is less in-depth as the forum for any number of reasons, it is still entirely possible to play anything from highly literate posting to near rapid fire single sentences.

I would offer, [@Stitches], that one could store the characte sheets here and the main topic but host the roleplay solely on the official Discord. The only issue that tends to arise otherwise is, is that advertising other Discords is a taboo; players should be getting those in private if they plan to play solely off of the forum; it is generally an issue with advertising. The goal is to have the activity centered on the forum after all.