Yup... Okay, the relasionships are,
for Sorenia-
Sora, best friend, and personal maid, has known her for so long, she will give everything up for her.
Ezuma, A annoying brat, doesn't enjoy her compony, can easily agetate sorenia, she wants Sora to learn how to control her sister.
Tenji,Another of her closet friends, literally, her knight assinged to take care of her, she has not love intrest in him, but by the way they act, it's almost as if they are one person.
for Sora-
Sorenia, her best friend, wishes she wouldn't be so easily agetated, but trusts her with her own life.
Ezuma, little sister, she loves her, but wishes she would stop annoying Sorenia.
Tenji, another close friend, has always felt awkard around him, people joke about her liking him, but she freaks out over it, so people think it's true.
For Ezuma-
Sorenia, fun to annoy, she's like a babysitter that she loves to have get mad at her, but fears her when she is mad.
Sora, older sister, loves her, but finds her fun to make fun of, like she is the older one.
Tenji, she really likes him, he got her that teddy bear and he won her over, granted, she's a little clingy, and hates to think that her sister does like him.
for Tenji-
Sorenia, one of his closet friends, at some points, his job is more important than ever, can be really over-protective of her, sometimes, he doesn't know what he thinks of her, he sometimes act like her Dad, wishes she would get along with other people and other times it's like he looks at her a whole new way.
Sora, Really fun to be around, he likes her, but not like that, he really likes how Sorenia gets along so well with her.
Ezuma, just another little girl who comes along with her sister, he has no clue that she "loves" him, but he's still really nice to her, he thinks of her as his little sister.

Yeah....wait...me? lol. xD I love that part. SIT DOWN AND SHUT UP!