I have some light sources that I am using to cast GI light onto a character, but I want them to not show up in the render (but have the lighting still hit the character). Is this possible?

Yeah, you can do this -- planes are a good way to go (they face one way and illuminate, but on the other side they are see-through).

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

You can also make the plane a dummy in case it's two-sided (the built-in iClone emissive planes are). It will still illuminate. 

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