In the episode "Mimic Madness," SpongeBob takes form and mimics the French Narrator, revealing that he has a gray goatee and gray hair. He also wears a red beanie, similar to the one that Jacques-Yves Cousteau is known to have worn. His full physical form has been seen in "Feral Friends," where he is seen with a diver's helmet and a red beanie.
A group of scientists enlisted his help to narrate, and at least, some of the time, film a group of unique sea creatures and one land creature in a colony of intelligent fish. The team's mission is to teach people how to behave better.
He has a mother, whom he calls "ma mère." She is currently living and may reside near the ocean, as the French Narrator mentions that he can see her from above the Bikini Bottom map in Creature from the Krusty Krab.
He speaks the first lines in the whole series (except the Captain, who sings the theme song). His first lines are "Ah, the sea... so fascinating. So wonderful. Here, we see Bikini Bottom, teeming with life. Home to one of my favorite creatures, SpongeBob SquarePants. Yes, of course he lives in a pineapple, you silly." He narrates in most of the episodes in season 1 and season 2, but not as much in seasons 3-9.
The French Narrator is heard in a few SpongeBob video games:
In SuperSponge, he narrates the first and final cutscene in the PlayStation 1 version.
He only works with the TV narrator in the video game Lights, Camera, Pants! When they first meet, they seem to not like each other, but by the end of the special they are friends and become closer to each other.
"Ah, the sea... so fascinating. So wonderful." —"Help Wanted"
"Don't say another word. I have been monitoring the behavior of the green moon all day. It is called Neptune's Moon. Every 100 years, it de-evolves everyone in Bikini Bottom into primal fish for two hours." —"Feral Friends"
Not counting the theme song, the French Narrator is the first character to speak in the series.
In "Can You Spare a Dime?," a time card with the text "So much later that the old narrator got tired of waiting and they had to hire a new one," being read by the British narrator with an English accent (voiced by Dee Bradley Baker), is shown, jokingly claiming that the French Narrator had quit, since he got tired of waiting. However, this was not permanent, since he came back in Rock-a-Bye Bivalve.
In "Sun Bleached," he uses the time card "Two Hours Later" twice. The first time is when SpongeBob is overtanning in Patrick's tanning machine; the second time is when they dance for two hours when the lights are on "Bleached," causing everyone to dry up and change into small piles of sand.