Someone help me out here -_-

[puzzled]

I have a feeling that I'm missing TONS of extra characters and items.

Right now I'm in the underwater road to the airport, and from the posts that I've read, it seems like I don't have a lot of charas.

I don't have this Lily character from the institute. I don't have Nash (I saw his cave earlier but he didn't join, do I need sarah to visit him or something?). Vanina is still in the ultai capital. I never saw this royal library or whatever.

I just saw this aqua guild but I don't have any fish besides petula, it seems like I must have missed a mermaid somewhere or something.

Can anyone list where to get secret characters and relics/ultimates?

[seeliewight]

Search the forum would be my best advice.
The information is there, all scattered.