Find the missing character?

C
L
Q
Y

The missing character is $\boxed{\text{Q}}$.

The other three characters, $\text{A}, \text{L},$ and $\text{Y}$, are all vowels. The only consonant that is missing is $\text{Q}$.

A consonant is a letter that is not a vowel. The vowels are $\text{a}, \text{e}, \text{i}, \text{o},$ and $\text{u}$. The consonants are all the other letters.

In the English alphabet, there are 26 letters. Of these, 5 are vowels and 21 are consonants. The consonants are:

  • B
  • C
  • D
  • F
  • G
  • H
  • J
  • K
  • L
  • M
  • N
  • P
  • Q
  • R
  • S
  • T
  • V
  • W
  • X
  • Y
  • Z