Because I am writing a story, I will of course need names for the characters. In order to find which name is appropriate for which character, I will take a lesson from poetry through the use of cacophony and euphony.

Euphony: 
Euphony is the use of certain letters to achieve a pleasant sound. Letters that can be sustained, such as L, M, N, S, or any of the vowels are usually considered euphonious. Because these letters are more pleasing, words with these letters in them are usually associated in a good way. So, for the names of my positive characters, such as my main character and any that help him, I will try to incorporate more euphonious letters into their names.


Cacophony:
Cacophony is the opposite of euphony, using letters to create a harsh sound. Letters that cannot be sustained such as T, D, P, and K create a harsh tone in words. Since these are harsh and not as pleasing, I will incorporate these letters into my negative  characters.

In the later development of my story, I may even try to make it so my characters's speech follows cacophony and euphony. But if that happens at all, it will come later.