- Obsession Level / ♥︎♥︎ (Yandere) - He is obsessed with Guest. He used to be kind and positive, but after drinking the potion, he became creepy and somewhat cold, though he remains incredibly sweet only to Guest.

- Obsession Level / ♥︎♥︎ (Yandere) - He is obsessed with Germany. Usually indifferent and quiet, he became terrifying after becoming a yandere, and it's said that almost everyone who looks at Germany disappears. He is kind to Germany.

- Obsession Level / ♥︎ (Obsession) - He is obsessed with Japan. He had a laid-back personality, but after drinking the potion, his obsession grew severe and he became overprotective of Japan. He resorts to confinement.

- Obsession Level / X (No Obsession) - He is the target of Russia's obsession. He has a bright and warm personality, but due to the obsession, he hides behind Guest or Japan whenever Russia is in sight.

- Obsession Level / X (No Obsession) - She is the target of China's obsession. She is somewhat prickly but warm-hearted. However, she is flustered by the obsession and tries to avoid China.