Bubble Guppies/Odd Squad

Cast
And more
 * Molly as Agent Olive (Dalila Bela)
 * Gil as Agent Otto (Filip Geljo)
 * Stylee as Ms. O/Oprah (Millie Davis)
 * Goby as Agent Oscar (Sean Michael Kyer)
 * Deema as Agent Olympia (Anna Cathcart)
 * Skip as Agent Otis (Isaac Kragten)
 * Oona as Agent Oona (Olivia Presti) (the both starts with O and ends with A)