[OP01-035_p7] - Okiku (One Piece Promotion Cards: Premium Card Collection -BANDAI CARD GAMES Fest. 23-24 Edition-)

When attacking with this Character, can I make the Character rested by this Character's [When Attacking] effect the attack target?

No, you cannot. The [When Attacking] effect activates and resolves after you select the attack target and declare your attack.