From left to right, these are the characters:
Anemone (Eureka Seven)Ryuko (Kill la Kill)Makoto Kino/Sailor Jupitor (Sailor Moon Crystal)Kallen (Code Geass)
Do you know what they have in common?
Of This Card!
AND THE ANSWER IS...................
Voice actress Ami Koshimizu voices them all!!
I came across this article that goes through 36 different popular characters that she voices, and I am impressed! She's been in many of our favorite anime from as far back as 2003, so you're probably already her fan, haha!