1. Aidan is a name from the Gaelic origin meaning fire. 

I could see this fitting someone with a temper or perhaps the name of a vampire.

2. Belinda: Pretty one, very beautiful.

I like this name because it isn't overly used now and would make the character stand out.

3. Colden as a boys' name is of Old English origin, and the meaning of Colden is "dark valley.

I see this fitting someone who is athletic and moody. I don't know why.

Delilah

Hebrew: Desired, seductive; The biblical Delilah tempted Samson into revealing the secret of his strength.

I will post another name meaning chapter tomorrow