Play as Yuki during the first fight in the Marina level and press Down + Y to use the chainsaw uppercut against any enemy. A cat's face should appear. Press Start while the cat is visible to teleport to a triple Boss fight. Beat the bosses to get a present containing the Achievable Bead.
The achievables Bead is required for this achievement, as well as playing as Yuki. At the first fight in the Marina, use a chainsaw uppercut on an enemy (DOWN + Y). When you see a cat's face, press START and you will face a triple boss fight. Defeat them to get the Bead.
Perform the following steps to get an electrical sword (cloud sword needed):
1. Play as Yuki in Story Mode (any level). 2. Charge your Cloud Sword (hold Y) 3. Once fully charged, switch to your other weapon using RB quickly and switch back. 4. You should end up with your cloud sword charged with electricity when you move (stops after a while).