I've already basically planned out the lives of almost every main character up until their death and/or the end of Arcatis II

In the first game, the three main characters clearly have nothing super special or secretive about their back stories. Well maybe Cathy's a little...and the part with Joe's gun, but other than that, nothing.

Don't open spoilers unless you've played the first game.

Bob: Born in Silverwood Village. Joe is his childhood friend. The two are practically inseparable. His dad disappeared when he was very young, and his mom does a decent job of taking care of him and stuff. He's always liked adventure, and most of the enemies defeated in the game are knocked out, not killed, because the thought of something dying, in any way, scares him. He also has a very good sense of judgement when it comes to trusting people.

Joe: Also born in Silverwood Village. He got Bob into trouble a few time, but has always been there for him when he needed to be. His brother disappeared only a couple years before the start of the first game. His father was Bob's father's childhood friend, and not a lot hasn't been passed down. He likes to be the best at everything, and has a much better chance at that than Axel... He'll never admit that Bob is like a brother to him.

Before the start of the second game, Joe's father gives him a gun to prepare him. How is dad knew about this, and why he let his son go on a dangerous journey without a second thought, is unknown (to you)

Cathy: She was raised in Silverwood (maybe born there? I haven't decided) and, at the age of 10, became an orphan. The Black Knights

came to her house, and angrily questioned her parents about The Mana Orb. They were killed, and her brother, Steve helped her escape, but was captured, himself. The mayor adopted her, and 6 years later, she enrolled at Silverwood Academy, determined to avenge her parents and protect people from The Black Knights. She met Bob and Joe during their first year at the school, and the three became fast friends. She also developed a bit of a rivalry with Joe.

Throughout the first game, there are a lot of mysterious characters, who's back stories won't be revealed completely until the sequel.

Harry: He knows more than he's saying. Bob trusts him completely, but doesn't know why.

and other than the fact that he's been helping the main characters a lot, very little is known about him.

Brandon: The only person I'm naming here who, in the first game, isn't seen at all. All that is known, is that he has helped Harry and Bob's father in the past. His only appearance was in a dialog only, flashback cutscene.

Daeva: The weakest, and lowest ranking Black Knights commander. She faked her own death, making for a very scary moment in Bob's life that he tried very hard to forget until Jon mentioned it later. It seems safe to assume that, like most of The Black Knights, she's blindly following Kane, hoping he'll share the power he will get from The Mana Orb.

Adrian: One rank above Daeva in The Black Knights. He hates that Jon is his superior, when Jon is only 20 years old and joined only two years ago. Adrian also seems to hate Kane. Part of his hatred for Kane is due to the fact that Kane killed the original leader, and founder of The Black Knights. He can teleport without the help of The Sacred Grove, and fought Bob's father.

He seems to be doing something that doesn't involve The Black Knights...

Jon: Second in command of The Black Knights and the youngest member so far. He seems to also be the strongest member (without the help of The Mana Orb). That's pretty much all that is known about him.

Kane: The only one who's reason for joining the organization is revealed in the first game. Even then, it's at the very end.

He seems to just be evil...

And that's not all. It seems I just really like to hide things about characters...