Episode – 12 characters
Matsuda & Motohama – They are Hyoudou Issei's friends from mid-school, on graduation they decide to enroll in Kuou Academy because they just change from an all girls school to co-ed. The reason they want this is that there would be high population of women to men, so that they could fulfill their dream of having a harem.
Kiba Yuuto – Is extremely popular with all the girls, and because of this he is envied by Issei, Matsuda, and Motohama. Although it seems that he will play a larger role later on.
Rias Gremony – Is the President of the Occult Research Club, and another key character in the story. However for some deeper reason she has been keeping a close eye on Hyoudou Issei.
Hyoudou Issei – Is overtly perverted, and has some strange dream about being a harem king. Which if you ever watch Yu-Gi-Oh, the joke that the writer is making is quite apparent. Although after he dies he has a slight change of heart. It will be interesting how much he maturates over the course of the series.
Himejima Akeno – She is the Vice-president of the Occult Research Club, and her personality is a refection of the Yamato Nadeshiko “Ideal Japanese Woman”. Although other than this not much is revealed.
Toujo Koneko – First year student at this part of the Occult Research Club, and is classified as a loli character that is popular with men and woman.
Ashia Argento – She is a nun that has recently moved into the city that Issei lives in, but the strange thing is that, the only church in town doesn't have a Priest so no-one see a point in going there. Other than this brief introduction not much more is given out about her.
Shitori Souna – She is the leader of another group of devils at the school called Sounashitori. Also she is the president of the student council, it appears that everyone that join her family has to become part of the student council. There is also the fact that she is the childhood friend of Rias Gremony.
Shinga Tsubaki – She is the vice-president of the student council, which means that it is likely that she was is Souna's Queen. Although anything more isn't really known
Grayfia – She is the queen of Sirzechs, like Akeno is Rias's Queen. The other things is the question is who Sirzechs is, and that very simple. He is Rias brother.
Rizer phoenix – Is a jerk and a womanizer, also he is the heir to the phoenix clan. It also appears that he is Rias fiancee, even so he doesn't care that she doesn't like him. He just see her as an opportunity to obtain greater power, as well as another conquest.
Episode – 12 Summary
In the aftermath of the rating match, it appears that Issei has been asleep for two days even after being healed by Ashia. Then before he wakes up he has a conversation with Ddraig, which he alludes to the fact that in the future his is going to meet a white dragon. The reason is that they are destine to fight each other, another thing he implies is that he suggests that Issei is not normal. It could even be interpreted from Ddraig words that Issei himself is a dragon. Although the lasting he says to Issei before he wakes up is that he is going to need get a lot strong to face the things in his future.
After he wakes up he comes face to face with Grayfia, which informs him on what is going on. That Rias forfeit the match because if she didn't Rizer would have kill Issei. That everyone is in hell from a party to announce Rias engagement to Rizer, expect for him and Ashia. Then with that she leave Issei with a summoning card to get him there, but after Grayfia leaves Ashia comes in and is overjoyed that Issei is finally awake. The reason being is that she feared that he would never wake ever again. Then before he leaves for the party he make a few final preperation with Ddraig and Ashia for his rematch with Rizer. Issei intent not to just have a rematch with Rizer but also to take back Rias from him.
Issei arrives at the party, but when he arrives it seems that the others were waiting his arrival to try and take back Rias. Then before things get too out of hand Lucifer shows up, and states that he was particularly displease with Rizer performance in the rating game. That he feels that his actions bring a degree dishonored to his families name, so he wants Issei and Rizer to have a rematch. Lucifer also tells Issei by agreeing to this he is doing him a favor, so that in return if Issei wins. Then he would have the right to request anything he so desires from Lucifer and he would be honor bound to grant it. While Issei could request for anything, he ask for Lucifer to return Rias to them. Which basically means absolving the engagement between Rizer and Rias.
Then as they are about to begin the fight Issei boast that he will beat him in ten seconds, this causes Rizer to come back with he will beat him in five. Shortly after it starts as Issei is charging Rizer he request from Rias to use his promotion power to become a queen. Then once he has been promoted, he uses his over-boost, which means for ten second he will have full-access to Ddraig's powers but to get this he has to sacrifice a part of his body to use it. This turns out to be the vary thing that he needs to fight Rizer on even footing, but it also gives him a bit more of an edge as well. This means that his arm is no-longer his arm but a dragons arm which means that part of his body is immune to Cross and Holy-water. This allows form him to deal major damage to Rizer by increasing the power of the cross that Ashia use to wear. Although Issei wastes half of his time in over-boost by telling Rizer about all this, which cause Over-boost to time-out before he can finish Rizer.
This Leads to Rizer come back where he grabs hold of Issei, but think that he has him where he wants him. Rizer doesn't expect for Issei to pull out a bottle of holy-water, and enhance it by using his sacred gear. This cause Rizer to lose his regeneration powers because Rizer can regenerate his body but not his soul. That is the very thing that the Holy-water ended by attacking. Then with Rizer in this weakened state Issei finish him with enhancing both the holy-water and the cross together to deal a massive blow. Then before he make contact Rizer goes no about does Issei know what he is doing, that this marriage is for the benfit of all devils. In response Issei says that he doesn't care because he is an idiot that doesn't understand complicated things, that the only reason he needs is that Rizer made Rias Cry. That does doesn't need any other reason than that, then we it look like Issei is going to hit Rizer again and that this will result in his death. Lucifer stops the match because it is clear that Issei is the winner.
Then with everything finished, Issei take Rias back to the human world on a griffon. While on the way back Issei and Rias have a bit of a romantic moment. Where afterwords she tells him that she is now going to start living with him. It will be interesting to see how that will turn out in the next season of the series. Things end with Lucifer talking with Grayfia about a white dragon, called the vanishing dragon. The question is what this white dragon will really be in the end, is it going to be another gear like the red dragon is or is it going to end up being Issei summons. Since if you remember when he and Ashia went looking for familiars she is the only one that returned with one. In the end all we can do is wait for the next season of High School DxD, to find out the answer to these questions.