Some things to address before you send in your ideas.
1: The name must end with "vote"(Like Downvote; One person already did this, so I decided that it would be helpful if you do this: 'Upvote').
2: Every character has some sort of weapon, so think of a weapon/power included with them.(Like a Minecraft Tool, or a Superpower, just make sure to go to the Meme Generator and search for the Weapon/Superpower in the Add Image section to make my life easier)
3: Since I've already planned to make sequels of the first Upvote vs. Downvote, some names might have already been thought of for certain characters. If this is the case with the name you thought of, then I'll say "The name has already been planned for another character" or something like that.
4: A character's personality is something that I usually come up with myself, but if you come up with a great personality that catches my eye, I might consider it.(And change the current personality/keep the current personality for later just in case)
5: And finally, the best name will be picked based on my opinion, but not based on the amount of upvotes a certain name has. If it's popular enough then I might consider it, but it's unlikely. If the name doesn't get picked, then you can still keep it for the next public character naming process, and who knows, I might pick it then.