I did a few tests trying to figure out if it mattered what clothing I was wearing for influencing. It certainly is supposed to. Here are a few tests I did with Charity. In theory, the worse you look, the better for Charity influencing. Also, in theory, the more covered you are, the better for all forms of influencing. I'll do more tests with other forms of influencing later.

Trans influencing
16 charisma
vs. Tosha Monk
(Weak against Charity)
(Since they regain ego very fast when not being influenced, when they move and have to be chased, they usually take an extra hit)


Essentially naked
like a naked fool
(nothing at all)
6 hits (7 tests) (no move)
6 hits (1 test) (1 move)
7 hits (2 test) (1 move)

Bit underdressed
Well-to-do
(shirt, skirt, cloak, slippers, shawl)
6 hits (7 tests) (no move)
7 hits (3 tests) (1 move)

Bit underdressed
like royalty
(no clothing, 2 bracelets, 2 rings, 2 necklaces, 1 brooch, 1 tiara, 1 torc)
6 hits (6 tests) (no move)
7 hits (1 test) (1 move)

Dressed normally
like royalty
(shirt, skirt, cloak, slippers, shawl, 2 bracelets, 2 rings, 2 necklaces, 1 brooch, 1 tiara, 1 torc)
6 hits (6 tests) (no move)
6 hits (2 tests) (1 move)
7 hits (2 tests) (1 move)

Master Quettle
12 hits fully dressed and jeweled

Other Masters
9 hits fully dressed and jeweled
9 hits fully dressed and unjeweled
9 hits completely naked and jeweled
9 hits completely naked and unjeweled


From these tests, clothing doesn't seem to matter, at least for Charity, or maybe not enough to be visible at my skill.

I've also found the same, that going from Royalty to Common changes the amount of influence hits required unnoticeably.