Tsubomi tends to act mature for her age, and is often capable of cowing senior students by pure force of personality. She also seems to have a crush on Hikari, although she calls it pure admiration. Also, she often lectures Hikari and Yaya when they do something wrong in regards to their school work and responsibilities. She is a member of the St. Spica Choir and it is believed that the reason she joined was because of Hikari, though Tsubomi denies this. There are some very faint indications that Tsubomi may be developing an interest in Yaya, later in the series. Tsubomi sometimes gets embarrassed when around Hikari due to either what Hikari says or of what others say. She tends to get angry or flustered easily, giving her an outspoken and very expressive personality. In effect, she can be loud in her opinions of others. (Source: Wikipedia)
Amane appears to be a very loved and respected member of the school, much like Shizuma Hanazono, although she is more of a local celebrity of Spica. She is often seen riding a white horse named Star Bright, which makes her seem more like a prince (a title which Shizuma later marks her with) from a fairy tale. Furthermore, she looks very much like a guy and in effect, a lot of the students at St. Spica are her fans. She tends to have a silent demeanor, which also makes her seem intimidating, making her difficult to talk with or approach. She too has a crush on Hikari, showing her affection much in the way a man does for a woman. Amane, much like Yaya, looks out for Hikari and protects her when need be. (Source: Wikipedia)
The student council president of Spica, she is a very shrewd girl and is constantly scheming something. However, despite her initial demeanor, she is moderate in personality and rather disinclined towards extreme measures and outright obstructionism. This is in contrast to her associates Kaname Kenjou and Momomi Kiyashiki. After the current Etoile graduates, she would like very much for an attendant of Spica to become the next Etoile and is constantly pushing for this to take place. Her best bet right now is to try to convince Amane Ootori to consider the position. (Source: Wikipedia)
Chiyo is a young girl who recently arrived at Astraea Hill, where she quickly became the "room temp" for Nagisa and Tamao, which incidentally is exactly what she wanted. Chiyo tends to be a very shy girl who is unable to articulate herself forcefully enough most of the time and is also rather a klutz. Additionally, she too seems to have a crush on Nagisa, which can also be construed as a form of admiration and idolism on her part. Also, she is a member of the Library Club and works as a librarian in Astraea's Library. (Source: Wikipedia)
The current Etoile. She is a highly respected and much beloved person to most of the other students attending the three schools. She looks very mysterious and also seems to have a number of secrets to match this visage. This makes her a difficult person to figure out or to even talk to for someone just meeting her. Most of her secrets and personal problems seem to be related to her prior relationship with Kaori Sakuragi, her now-deceased Etoile partner. She is very skilled on the piano and likes to play it constantly. Much of the time, she doesn't enjoy the dull work of the Etoile, so she often finds ways to skip on her duties, much to the annoyance of Miyuki Rokujou. However, Nagisa manages to persuade Shizuma to resume performing her duties. (Source: Wikipedia)
Kagome seems very childish since she carries around a teddy bear named Percival everywhere she goes and talks to it constantly, even referring to it as if it were a real person. She has a quiet voice and seems rather sad and lonely at times due to the fact that she doesn't seem to know a lot of people or have many friends at that. After becoming friends with Chikaru, Kizuna and Remon, she started to follow them around as well and became a member of their tight-knit group. She is apparently also fond of Nagisa Aoi from Miator, due to an incident between them which involved an umbrella. She seems to have a high degree of artistic abilities, as is shown when she is building sand castles, or acting in Romeo and Juliet. She also seems to have a heightened perception of others' emotions and can tell when those around her are deeply distraught or in emotional pain. (Source: Wikipedia)
Kaname is a very domineering, forceful, and devious girl who is also on the student council for Spica. She often likes to take matters into her own hands when Shion - or Kaname herself - doesn't get her way. Kaname apparently considers herself irresistible and has no interest in objections to the contrary. Much like Amane, her appearance and personality make her seem more masculine than feminine. She is later revealed to be jealous of Amane, who has effortlessly defeated her at everything since she first came to Spica. It is also suggested that she felt an attraction to Amane at one point, or at least that her self-comparison to Amane has become a central factor of her life. Her main friend and ally is Momomi Kiyashiki, who is very much like Kaname in personality. They share a sexual relationship and seem to be in love with each other. Together, they are the closest thing to antagonists in the story. Ironically, since Kaname is usually the instigator of their plans, she also seems to possess the strongest sense of personal honor, desiring victory through achievement, not forfeit. (Source: Wikipedia)