Misty is gamehag's mascot, she is a witch. If you meant who is using Misty's account (https://gamehag.com/profile/misty) I honestly don't know, perhaps gamehag's owner. As a matter of fact, it's the only account I've seen to be level 30 (the highest level).
Its a system bot
in 3 steps
Choose the game that interests you and play itfor free.
Every game has some quests for which you will receive Soul Gems.
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
You know that on Gamehag you can get real rewards for free, right? Join us, complete walkthrough and get your chest!
Who is Misty? xD