Nurse Joy

Nurse Joy is a collective name for every female nurse who appears in Tears of the Fallen. There's a variety of them around the Pokémon world and they take on various jobs, with the most common one being a nurse in Pokémon Centers / hospitals.

General
There is a large number of Nurse Joy's throughout the world. They take on various jobs in the world, ranging from caretakers to accountants and more. Most commonly, though, they are nurses in Pokémon Centers, which double up to serve as regular hospitals as well.

They look very similar and are actually all related. This is a gimmick originating directly from the Pokémon franchise. "Joy" is not their first names, but actually their family name. When people not in their family identify them, as long as there's only one, they're fine with responding to "Nurse Joy" or "Joy-san". If there's more than one near each other, they will likely give their first names to be called to tell them apart.

Present
A Nurse Joy first appeared in Episode 20. Situated in Blackthorn City in the Johto region, she was in charge of the foster home where Mairin stays. At night, she went up to Mairin in a forest close to the foster home, who was with Ash, Alain, and Dawn. She says it's time for Mairin to come home for the night. Once Mairin leaves, Nurse Joy talks to the others about Mairin. She's glad to see that Mairin has friends to hang out with.

It turns out that this Nurse Joy took over in charge of the foster home after another Nurse Joy was previously in charge. The previous Nurse Joy was there when Mairin was brought in from Camphrier Town, Kalos, since there wasn't an opening at a foster home in Kalos. According to Mairin's babysitter at the time, her parents had died due to a drunk driver on the road when Mairin was very young. The current Nurse Joy states that no one has ever tried to adopt her from the home, but that she's very friendly. She welcomes the Mokusetsu to visit Mairin anytime. Lastly, she tells Ash that Mairin's favorite snack are blackberries.

That same Nurse Joy appeared at the end of the episode to talk privately to Ash as Mairin was getting something from her room.

Naming

 * "Joy" is their name in both the Japanese and English versions of the Pokémon anime. It's actually not named after the emotion, but after "joi" (女医) which means "female doctor".

General

 * In Tears of the Fallen, the Nurse Joy share this extended family trait with Officer Jenny.