Red Velvet Cookie is an epic-quality cookie that you can collect in Cookie Run Kingdom. Interestingly enough, he is also one of the major antagonists in the story set in Devsisters' mobile collectible game.
Red Velvet Cookie Topping Guide (+9-30 & Arena Test) | Cookie Run Kingdom
As with all cookies, there are specific toppings, cookies, and composition information you need to know in order to maximize his position in your team and use his abilities effectively.
Red Velvet is an Epic Charger cookie, meaning he's usually best positioned on the frontlines of your team. This is because Charger cookies focus primarily on dealing damage and being the heavyweights of your Cookie Run Kingdom lineups.
When Red Velvet Cookie is up front, he can use his powerful ability to deal significant damage while protecting the cookies in the middle and back lines.