This is confirmed.
If you want to remove your negative racial buffs, you can re-buff hero's roar or even SOD again since it will last only a second - and the negative racial buff effect is gone for good (-defense/attack), at least until you log off.
Tried and tested getting hit with mobs while having SOD and having no(forced removal of )SOD.
And guys, for Bellato Archon Buffs:
+HP/FP
34
+Atk/Def
32