What is soohia twd?

There is no character by the name "Soohia" in the TV show, The Walking Dead. It is possible that you may be referring to Sophia Peletier, who is a character in the series. Sophia was the daughter of Carol and Ed Peletier and became separated from the group during the second season. She was later found turned into a walker and had to be put down by Rick Grimes. Sophia was portrayed by actress Madison Lintz.