Karin is the niece of Dr. Aki. She attends Rosewood Private School along with Koji. She is also a childhood friend of Koji. She is popular in her school, and is admired by many of the students there. Although she is from a rich family, she is very caring and finds time to help people. Koji and Ikki constantly fight for her attention in the series. She loves cleaning stuff, which had once given Ikki the impression she was poor and needed to work to pay for tuition.
Medabots
Medabots—powerful robots granted artificial intelligence through special "medals"—serve at the whims of their owner. They are more commonly used in "Robbatling," a popular combat sport where two medabots face off against one another. In its professional form, Medafighters use their Medabots to qualify for the World Tournament and fight amongst the elite to gain the title of champion. Elementary schooler Ikki Tenryou has just gained his first Medabot: Metabee, an outdated model with no medal. Fortunately, however, Ikki manages to find a medal in the nearby river; but when Ikki places it into Metabee's head, the latter starts to exhibit strange behaviour. Short-tempered and rebellious, he refuses to obey Ikki's orders. However, to climb the ranks to the World Tournament, Ikki and Metabee must first learn to work together, no matter how difficult the prospect may seem…
