1: original: asterisks

*This is narration on its own line.*

And this is dialogue on its own line.

This is dialogue that contains *a small in-line action* in the middle.


2: normal brackets

[This is narration on its own line.]

And this is dialogue on its own line.

This is dialogue that contains [a small in-line action] in the middle.


3: bolded brackets

[This is narration on its own line.]

And this is dialogue on its own line.

This is dialogue that contains [a small in-line action] in the middle.

Note: I mistyped the bold html multiple times in this small test alone. Regardless of how it winds up looking that's a large strike against it in my book.

4: italicized narration

[This is narration on its own line.]

And this is dialogue on its own line.

This is dialogue with [a small in-line action] in the middle.

This is telepathic dialogue or thought with [a small in-line action] in the middle...

Note: probably not so much, being in a game where telepathy is a thing.