MerceResource:
merce_09_360_NOMIP_BM
to
merce_21_360_NOMIP_BM
Mercenaries title screen.

merce_26_360_NOMIP_BM (chris bsaa)
merce_27_360_NOMIP_BM (chris safari)
merce_28_360_NOMIP_BM (chris stars)
merce_29_360_NOMIP_BM (sheva bsaa)
merce_30_360_NOMIP_BM (sheva tribal)
merce_31_360_NOMIP_BM (sheva clubbin)
merce_32_360_NOMIP_BM (jill bsaa)
merce_33_360_NOMIP_BM (jill battlesuit)
merce_34_360_NOMIP_BM (wesker midnight)
merce_35_360_NOMIP_BM (wesker stars)
are bitmaps for character portraits. Used in duo lobby.

versus_03_360_NOMIP_BM (chris bsaa)
versus_04_360_NOMIP_BM (chris safari)
versus_05_360_NOMIP_BM (chris stars)
versus_06_360_NOMIP_BM (sheva bsaa)
versus_07_360_NOMIP_BM (sheva tribal)
versus_08_360_NOMIP_BM (sheva clubbin)
versus_09_360_NOMIP_BM (jill bsaa)
versus_10_360_NOMIP_BM (jill battlesuit)
versus_11_360_NOMIP_BM (wesker midnight)
versus_12_360_NOMIP_BM (wesker stars)
are bitmaps for fullbody character portraits. Used in singleplayer selection.

versus_29_360_NOMIP_BM (chris bsaa)
versus_30_360_NOMIP_BM (chris safari)
versus_31_360_NOMIP_BM (chris stars)
versus_32_360_NOMIP_BM (sheva bsaa)
versus_33_360_NOMIP_BM (sheva tribal)
versus_34_360_NOMIP_BM (sheva clubbin)
versus_35_360_NOMIP_BM (jill bsaa)
versus_36_360_NOMIP_BM (jill battlesuit)
versus_37_360_NOMIP_BM (wesker midnight)
versus_38_360_NOMIP_BM (wesker stars)
are same as versus_03 to versus_12 but these are grayed out. Used in singleplayer selection. (these are apparently rendered ABOVE the coloured ones)

versus_17_360_NOMIP_BM (chris bsaa)
versus_18_360_NOMIP_BM (chris safari)
versus_19_360_NOMIP_BM (chris stars)
versus_20_360_NOMIP_BM (sheva bsaa)
versus_23_360_NOMIP_BM (sheva tribal)
versus_24_360_NOMIP_BM (sheva clubbin)
versus_25_360_NOMIP_BM (jill bsaa)
versus_26_360_NOMIP_BM (jill battlesuit)
versus_27_360_NOMIP_BM (wesker midnight)
versus_28_360_NOMIP_BM (wesker stars)
are bitmaps for closeup character portraits. Used in singleplayer selection.

List of pixel sizez of the fullbody character portraits using 1280x720 game resolution (they all have the same size in the texture files, but they're changed for the UI):
chris bsaa: 87x210
chris safari: 96x253
chris stars: 63x206
sheva bsaa: 76x181
sheva clubbin: 83x250
sheva tribal: 68x253 (her bow adds a ton of height, actual character size is similar to sheva bsaa)
jill bsaa: 77x209
jill battlesuit: 125x221
wesker midnight: 77x230
wesker stars: 141x256

Overall, Chris Safari and Sheva Clubbin (And probably Sheva Tribal) are the ones with the noticably biggest size on the UI. The rest are generally the same size, with Sheva BSAA slightly smaller. Wesker stars is slightly bigger, but it's not very noticable since he's on the far right.

MenuResource:
tm113_360_NOMIP_BM
Bitmaps for fullbody character portraits. Used for costume selection. Looks similar to versus_03 to versus_12
tm160_360_NOMIP_BM
Chris warrior and Sheva business. Used for costume selection.