[OP09-041] - Soul Franky Swing Arm Boxing Solid (Emperors in the New World: 2nd Anniversary Tournament Cards)

Can the [Blocker] effect of a Character that has been set as active using the [Counter] effect of this card be activated during the same battle?

No, the Block Step of the battle would have already ended, so you would not be able to activate a [Blocker] effect.