Find the missing character?

The missing character is B.

The sequence is a series of letters, each of which is two places before the next letter in the alphabet. So, the first letter is A, the second letter is E, the third letter is C, and so on. The missing letter is two places before T, which is B.

Here is a table showing the sequence of letters:

Letter | Position in alphabet
——- | ——–
A | 1
B | 2
C | 3
D | 4
E | 5
F | 6
G | 7
H | 8
I | 9
J | 10
K | 11
L | 12
M | 13
N | 14
O | 15
P | 16
Q | 17
R | 18
S | 19
T | 20
U | 21
V | 22
W | 23
X | 24
Y | 25
Z | 26