Hydrogen is a female host on Battle of the Periodic Table of Elements.
By weight, 75% of the visible universe is hydrogen, she is a colorless gas. In space, vast quantities interact with starlight to create spectacular sights such as the Eagle Nebula (seen by the Hubble Space Telescope).
She is nice, yet quite nice and cheerful person who is decently competitive and does her best to lead her team. She gets depressed very easily though and it can really push her far back in the game. She is mostly nice, but somewhat weak, and will be mostly disappointed if you cross with her.