One Piece: I Didn't Know Murder Was a Crime Until I Left the Holy Land

No System + Celestial Dragon + Sharingan + Mythical Zoan + Scholar + Roger Pirates.

First year after joining the Roger Pirates. Vikingum: "Could you guys not be so violent? I'm just a scholar, too weak to even truss a chicken!"

Fifth year after joining the Roger Pirates. Vikingum: "Slow down with the slashing! Leave one for me, I just learned a new move that can split his damn head open!"

Tenth year after joining the Roger Pirates. Vikingum: "Captain, why are you wasting words with him? I'm going to cut him into a blood mist!"

After reaching Laugh Tale and unraveling the mysteries of history. Vikingum: "This is only reaching the end point, not standing at the summit. Why the hell would we disband? I'm the most educated on this ship, so listen to me. Let's take down Shiki first, then hammer Whitebeard, and make the title of Pirate King a reality!"

Twenty years later. Vikingum...