The owner of the inn that Natsumi Takashi goes to in episode 8. It is told that while she was young, she came to like a person, known as Keiichi, who was around Takashi's age. However, Keiichi was sick. One day when he fell seriously ill, Chizu went to Sasafune to get mermaid blood. She fed Keiichi the blood and he was later on transferred to a faraway hospital. Thinking that she had made Keiichi's life miserable, she spends everyday waiting for him at a train station. It is revealed at the end of the episode that Sasafune did not give a vial of mermaid blood to Chizu. It was a vial of grape juice.
Youkai that first appears at episode 6 and 7 of Zoku Natsume Yuujinchou.
The class president of Takashi's class. Sasada believes that Takashi can see spirits, and constantly asks him questions about it, to which he replies that he doesn't have such an ability. Much to Takashi's chagrin, she wants to come along with him when he's visiting spirits. She possibly may have a crush on him in the anime, as she blushed in episode 5 when Takashi asked why she wanted to come with him to an abandoned train station (he was going there to see why Reiko had a ticket for that place). Luckily, he was rescued by Tanuma, who distracted Sasada long enough for Takashi to escape on the bus. The story in the manga differs slightly, as Sasada moves away after the encounter with Shigure, so she has far more spotlight in the anime. (Source: Wikipedia)
A youkai whom Natsume meets in the first episode.
Appears in episode 2. She is a Youkai banished from the village of Ukihara
Yasui is the potter who created the teacup Natsume picked up for Shigeru during the first season, when he initially met Kogitsune.