'Kallen Kouzuki' (紅月カレン Kouzuki Karen) is one of the tritagonists in the anime/manga series Code Geass. She is officially known as 'Kallen Stadtfeld' (カレン・シュタットフェルト Karen Shutattoferuto), and goes by this name at school, but prefers her mother's maiden Japanese name during her revolutionary (now military) activities. Kallen is a strong-willed, determined, loyal, and brave individual who can also be quite short-tempered, forceful, and somewhat impulsive. Despite her uncompromising attitude, Kallen is quite sensitive, compassionate, and genuinely gentle. While being both Japanese and Britannian, Kallen could live everyday life. However, she refused to fully accept her Britannian side as it would mean abandoning her Japanese friends, people, and self, thus making her one of the few selfless characters in all the series. On multiple occasions at the beginning of the series, she had claimed that she hates Britannians. However, that was an exaggeration, as Kallen caring about Britannian civilians on multiple occasions.

Schwi was the first Exmachina to be introduced in Tet's story. In the story she seeks to understand the human heart and was found by Riku. She looks like a young human but with several differences, being two tails coming out from her back and other machine like features protruding from around her body. She bears many similarities with Shiro. Her behavior is similar to that of a stereotypical artificial intelligence. She can absorb and process data and intelligence very quickly and act in the appropriate manner, a unique characteristic of her race. However, she seems to have difficulty in comprehending emotions and desires, otherwise characterized by her as the heart. (Source: No Game No Life Wiki)