What is the font used in the logo?

[Arthur]

Been working on a guide with a friend, and I kind of wanted to add some stuff (like section titles and things like that) via .pngs with the game's font. Anyone knows which one is it?

(also, am I allowed to do that? Like, will it break any copyright law or something?)

[Lydian ♭7]

Hollow Knight Wiki seems to say (can't double check now) that the font used in HK is called Perpetua.
I don't think there is any specific copyright restriction on fonts. Or minor decorations, for that matter. There is this 107% guide that uses HK's text box decoration as a separator between sections, and I don't think that one is having any legal problem.

[Hexamicor]

I was looking for the font that came up just before the Radiance fight some time last year, the closest I found was Trajan Pro Bold. It should be the same as the one in the logo.