FAQ
Can I use this [On K.O.] effect to place my Character at the bottom of my deck?
Yes, you can.
One Piece TCG [P]

[On K.O.] Place up to 1 Character with a cost of 3 or less at the bottom of the owner's deck.
Rarity
P
Color
Blue
Number
P-030_r1
Card Type
CHARACTER
Play Cost
4
Power
5000
Subtype(s)
Fish-Man/The Seven Warlords of the Sea/The Sun Pirates
Attribute
Strike
Yes, you can.