We're the third one, as long as you consider Noah and Bethany as a whole. They are called "Yin" and "Yang", bc they are polar opposites, while Bethany is more "the heart", our emotions and takes care of us to have a good image, Noah well....he firstly has anger issues, so talking to them without making them mad is hard. He is mostly "the brain" as he doesn't really care about having a bad image/reputation as long as he gets revenge. He assures most of our thoughts don't go undone. The funny thing is, Noah may have a sharp tongue, but he is both really sensible to phisical pain, and he isn't really that strong, he is stronger emotionally. Bethany, well, they let her emotions get ahold of her too easily, of course, if Noah is sensible to phisical pain, they'll be more sensible to emotional pain, but they are stronger phisically.
Bethany forgives easily, while Noah can hold grudges their whole life. Despite having a bad memory, he remembers the people who hurt us as if it happened yesterday. A single thing they both have in common is that they both have a soft spot for the ones they truly love. Even Noah! One time, Bethany called him a tsundere. Which we asume is because despite showing anger and hatred towards one particular person, deep inside, he actually cares abt them.