From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Colleen Smith Clinkenbeard (born April 13, 1980 in Shreveport, Louisiana) is an American voice actress, line producer, ADR director, and script writer who works for Funimation. She has provided voices for a number of English language versions of Japanese anime films. Her most notable voice acting roles are Rachel Moore in Case Closed and Monkey D. Luffy in One Piece.
Most notably, she voices Princess Snake in Dragon Ball Z, Zangya in Bojack Unbound, Mai in recent Dragon Ball video games, and additional voices in Dragon Ball GT. Her biggest Dragon Ball role is that of Kid Gohan in Dragon Ball Z Kai, replacing Stephanie Nadolny.