Ep 4. Goodbye and Vampire

In Rosario Vampire season 1 episode 4 entitled "Goodbye and Vampire," we follow Tsukune and Moka as they attempt to help Moka's little sister Kokoa who is having a difficult time adjusting to life at the Yokai Academy. As they arrive, Kokoa is determined to destroy her older sister and is angry with her for leaving their previous school.

Throughout the episode, we see that Kokoa is jealous of her sister's popularity and seems to harbor some resentment towards her. She tries to get Tsukune on her side by offering to help him take down Moka. Though Tsukune is conflicted, he ultimately decides to stand by Moka.

Meanwhile, the students at the academy are preparing for the upcoming sports festival, which Kokoa is also determined to win in order to prove her worth. As the day progresses, she realizes that Moka is not so bad after all, and that she truly cares about her. Moka reassures her that she will always be there for her, and that she loves her sister no matter what.

The episode ends on a bittersweet note as Kokoa says goodbye to Tsukune and Moka. They say their goodbyes, knowing that they will always stay together in their hearts.

Overall, "Goodbye and Vampire" is a touching episode that explores themes of jealousy, love, and family. It shows us that even in the world of Yokai, family bond is important and we must always cherish those who are close to us.