It is stated by Apollo in The Trials Of Apollo, that the Olympians know of other gods when Apollo mentions the god Ra, Apollo also mentions he once met a god who he calls "smoking hot" that had a talking sword, which could be a reference to Frey.
Fact 39
It is stated by Apollo in The Trials Of Apollo, that the Olympians know of other gods when Apollo mentions the god Ra, Apollo also mentions he once met a god who he calls "smoking hot" that had a talking sword, which could be a reference to Frey.