You can choose any font you want for your terminal, but only one at a time!
The native format of LLM interactions is markdown, and showing that in a terminal is a poor imitation of what it looks like rendered properly.
An interesting thing you can do in juggler is ask the LLM to reply in HTML instead of markdown, and they can then do things like illustrate points visually for you. LLMs are actually great at being able to express things visually to the user, but being stuck in terminals so much, people haven't really leaned on that very much