Red Heart is a U from the dimension known to a few as Dimension Zeta, and represents RPGs.

In her dimension, unlike Hyperdimension or Ultradimension, instead of Us that represent consoles, the Us represent genres of games, and consoles are supplied by other parties.

Because of this, there were many Us in her dimension, but all of them were very war-driven Us, and were constantly at war, resulting in many lost nations and scared citizens.

Red Heart was the only U who never attacked, and tried to separate herself from the war, which worked for many years, and her nation became the most heavily populated, since people flocked there to get away from war.

But then one day, the other Us finally noticed her and saw her as an easy target, and swiftly attacked, leaving her nation in ruin.

So she fled to Hyperdimension, where she waits for the war to end before she can return to reestablish a peaceful nation, knowing full well that day may never come...

Her human form is a small, 5' 1" girl, with short red hair and green eyes, and a pale complexion.

She wears a white jumpsuit, and black tennis shoes, and her main weapon is two claws that can be attached to her hands, with a laser blaster as a sidearm in case she loses the claws or needs range.

Her real name is unknown, as she left that behind with her nation, and just asks to be called, simply, Red.

She did not stop wishing to be called that even after meeting Red from Hyperdimension.

Her human form is shy and quiet, and very introverted. She hates crowds, and has a bit of a fear of public speaking. She doesn't like being relied on, because since the loss of her nation, she has lost a lot of her self confidence.

In her U form, she has long, red hair and her eyes turn red. She grows to 5' 11", while still remaining pale.

She usually wears all black, but can often be seen wearing all sorts of outfits.

Her main weapon is two plasma-powered short swords that can be combined into a two-bladed plasma staff.

Her secondary weapon is a laser rifle, great at long range combat.

Her U form is very confident, but still has moments of doubt in herself. She still doesn't like being relied on, but she is a little more confident. She is cocky at times, and quick to anger, but still tries to find the best solution that benefits the most people.

She likes peace, and hates war and confrontation.

Her favorite food is hamburger or a nice salad. She also loves sandwiches.

Her least favorite food is broccoli, and potatoes.

She loves videogames and reading books, and anything having to do with science fiction. She also likes puzzles, especially huge ones.

She hates doing chores, and doing anything having to do with work in general. She also hates spoilers. A lot.

But she has a secret that she has been hiding for her entire life....a secret that if she lets out could destroy everything she cares about....

Since her arrival to Hyperdimension, she has found great friends in Noirune and Cappy, but she hates Kurome, and the way she treats Cappy. She believes they will one day end up in a big battle...