|“||Oh well, if I can't [talk to Adrien], I'll ask Nino to help. He's a really great guy.||”|
—Marinette Dupain-Cheng, "My Birthday Party"
- Marinette Dupain-Cheng (narrator)
- Alya Césaire
- Adrien Agreste
- Nino Lahiffe
- Rose Lavillant
- Juleka Couffaine
- Ivan Bruel
- Mylène Haprèle
- Lê Chiến Kim
- Max Kanté
- Alix Kubdel
- Chloé Bourgeois
- Sabrina Raincomprix
- André Bourgeois
- Nathaniel Kurtzberg (background)
- Nathaniel, Chloé, and Sabrina are the only students from Miss Bustier's class that Marinette does not decide to invite to her party.
- While she actively decides not to invite Chloé and Sabrina, she does not mention Nathaniel at all.
- Marinette says that she thinks Mylène likes Ivan.
- She notes this despite being aware of this fact from the events in "Stoneheart".
- The webisode contains clips from "The Bubbler", "Mr. Pigeon", "Stormy Weather", "Timebreaker", and "Lady Wifi".
- As with several other webisodes, the clips of Marinette writing in her diary are from "Gamer".
- It was the fifth webisode in Korea.
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