I made a new mage with the Frozen Deity premade soul, and it always shows a two hand sword in game even though I equipped a staff in the wardrobe tab. The staff shows on the Wardrobe tab, on the character tab and on the character select screen.
Even when I select, "No wardrobe set" the equipped staff does not show in game, just the same two hand sword.
I bought another soul, and the staff properly shows in game with the Gravelord premade soul.