So MVP of Onyx Storm is 100%...

Ridoc "Madlad and Bi-Icon" Gamlyn, over the course of the book I believe he:

-Spends hours at Sawyer's bedside improving his mood

- Learns how to freeze water inside people and objects, which no Icewielder has ever done

-Coins the name "Quest Squad" and talks his way onto said squad with nothing but the cut of his jib and moxie

-Punches a cook and pulls off an immaculate platonic "I love you."

- Confronts the Irids with Violet

-Calls Violet on her bullshit and helps her set reasonable boundaries in a relationship that could easily turn abusive.

-Sets up a support network for Violet by making sure their squadmates know about Xaden's secret

-Freezes a Wyvern from the inside while flying one handed on a straight vertical climb.

In conclusion, he is my precious ridiculous Angel baby, and if anything happens to Ridoc, I will kill everyone in the room, and then myself.