gentle, Karen's personality sometimes seems more suitable for an older (rather than younger) sister. She is a very skilled pianist. In the magazine stories and mini-novels, Karen owns a kitten named Vanilla (who, incidentally, has a thing for vanilla flavored sweets). Like several of the sisters, she refers to herself in the third-person and addresses her brother as , a way to call a brother by a younger sibling, usually a child. In English, she calls him "Big Brother". Her birthday is September 23, although she is stated to be a Virgo her birth date actually falls in Libra, and stands 148 cm (about 4' 10") tall. The athlete of the group, Mamoru is always trying to get her brother to play sports with her. She is sometimes mistaken for Rinrin due to their similar hairstyles and their penchant for donning their eyewear on their head. As she is a tomboy, Mamoru uses phrases and mannerisms that only boys are expected to. As proof of this, she addresses her brother as , a shorter address used by a male teenager. In English, she calls him "Big Bro". Her birthday is October 18, is a Libra and stands 150 cm (about 4' 11") in height. Possessing a weak constitution, the bespectacled Marie has spent a lot of time in the hospital due to her illness. Her pet Michael, a Golden Retriever, acts as her guardian and friend when her brother isn't around. She addresses her brother as , the honorific -uesama (a combination of ue and -sama) being used within the royal family or as a sign of politeness. In English, she calls him "Brother Mine". Her birthday is April 4, is an Aries and stands 148 cm (about 4' 10") tall. Gifted in the fields of science and technology, Rinrin spends a lot of her time building things but constantly asks her brother for monetary donations to keep her projects going. Lately, she's been constructing a robot duplicate of herself, . She speaks with a strong Chinese accent and addresses her brother as , another way for a boy to address his brother. In English, she calls him "Bro". Her birthday is July 9, is a Cancer and measures 152 cm (about 5') in height. Sakuya behaves very much like a modern teenager and is fashion conscious. She would love for her brother to see her as a woman and