Well, if you're stuck in a rut, there isn't much you can do. It's a good idea to bring out Gerard's character. I understand if you want to bring out the characters well, it's probably important for the ending. Personally, I feel Gerard's character is even more dangerous because he is vulnerable. As for Mikey, he seems like he's strong, yet he can really open up his heart. He can control when he wants to but isn't like commanding. I guess he will be hard, because he doesn't have any prominent features, like Gerard, who's like you said, psychotic. But then again Gerard is also tough because of his mix. But I personally would find Mikey a little harder because he's normal. As for Alyn, I suggest you should pick one direction to travel in. If you want you can continue for a while with mixed feelings, but eventually you will have to pick a certain emotion or demeanour to associate with her. But don't let it on too soon. Write the emergence of a new feeling for her slowly, so that that major feeling collides with the end. It would leave an impact. You can go back and read all your previous chapters to re-study Alyn. I’m going to say it again, don’t rush yourself, write it slowly and at ease. Then again if you are like me and prefer to write under a time limit, you might want to set a time to write. Don’t write if you don’t adore your idea. That’s what I go by when I write. It shouldn’t be strained or forced. Let it come naturally. If you can associate something that happened to you or someone you know to this, you can write that as well. It’s up to you. You could even create a crazy climax, a mad, shock ending. This is just advice. You can of course pick an entirely new thing and surprise us all. As for the rut, take some time off to just read, it helps.