I will be using Chinese names because that's what I read.
Akuha or Yaiei in Chinese (亞愛) is the oldest daughter of the 4 and is apparently the illegitimate children of Yicha (一茶) Shuzen. She has come after her mom died. And as noted a moment ago, the father is introduced.
Tsukune at first notes that environment of the castle seems peaceful but Dongfangbubai (æ±æ–¹ä¸æ•—) says that it's actually the scariest place because all the vampires are concentrated over here. Even in the Chinese mafia world, vampires are highly regarded. Basically, this is an introduction of vampire culture.
Soon afterward, the father welcomes Akuha to the family but tells her to show "us" (referring to him and the other vampires) her strength by going against the 2nd sister. Tsukune is shocked that they're fighting after welcoming her, but Dongfangbubai says that it's the ugly vampire culture to battle.
The second sister cries (as she did against Moka) about fighting because she hates it, but she is immediately overwhelmed by Akuha's Chinese martial arts. The second sister even takes a critical hit and has blood coming out, but is able to still stand. Akuha notes that most people who take punch can't even get up for 3 days.
The second sister is able to get serious (as she did against Moka) and the 4th sister claims that Akuha is doomed, but Moka thought differently. Moka notes Akuha's incredible skill, poise, and confidence in combat. Further Akuha also has yet to reveal her true powers.
Just when the two are about to clash again, the father steps in and says that Akuha has proved her worth. He tells the other sisters to take care of Akuha.
Following this, a bodyguard comes in and says that there has been intruders in the area (obviously our main characters). Tsukune says that WE are the intruders? Dongfangbubai then reminds Tsukune that this is the "dream" world and that their real bodies is in the real world lying down.
We then shift into the real world. Everyone tries to wake the 3 up, but to no success. Fangfang's sister says that if they don't wake up, they can even possibly become the undead. She then sarcastically notes that it's at least better than her because she IS dead.
Subsequently, Fangfang receives a phone call from their butlers that the Maio (the rival family that Fangfang's mother was in... I think) family has arrived at the main house, which is where our characters are. Several limos stop near the entrance and a cloaked girl comes out and says, "So this is where you are, Moka." Based on that sentence and the sketches of her character, she looks like a grown up version of the eldest vampire sister- Akuha. Fangfang's parents are outside to greet them and there seems to be some tension as they've brought out the heavy artillery. Fangfang's mother says that her father must be sick and hidden himself.
Fangfang says that the Miao family is probably up to no good and the girls try to wake up the 3 sleeping heads to no success.
Back to dream world: We see Moka walking around outside the castle at the place where she first "met" Tsukune and yells out, "Intruder, where are you?". Mizore asks Dongfang if the past will change? Dongfang says no. If they were to show up, it's only the memory itself that would change. He explains that memories aren't constant and further states that because they have entered her memory, the memory is altered.
Tsukune then says that if the memory is already changed, then what should they do? Dongfang says that if it was just short meeting, nothing critical should change. Besides, she probably really did walk outside the castle. He says, the most important point is that they are NOT to interfere with this memory if they don't want to screw it up anymore. Right then, someone grabs Mokas mouth and takes her into the woods (like how you capture children).
Back at the castle, elder Moka says that little Moka is gone. She then remembers that little Moka said that she saw an intruder today. One of the sisters also note that Akuha is missing too.
We see the chinese mafia here asking for the whereabouts of Akuha. Tsukune at this point wants to go out and "rescue" Moka, but Dongfang says, "Idiot! Didn't I tell you to not interfere? The fact that Moka gets rescued here is a fact. The past won't change. The only thing we can do is observe." *Tsukune is shaking in anger* Little Moka wonders to herself if she was given some medicine because she can't control her body now. The headman of the chinese mafia comes over and asks where Akuha is because he is here to kill her. One of the headman's lackey suggests carving her up and throw the pieces into the castle. The headman notes that it's quite barbaric, but tells Moka, "But indeed, if we don't do this, we can't calm our anger." The lackey then prepares to slice Moka with his knife.
Just then, Akuha appears and punches threw the lackey's head and kills him. They call her "demon" and "dark demon." Dongfangbubai actually breaks a sweat here and says, "No way... that technique was...!" Mizore is quite surprised that someone of Dongfang's caliber is surprised.
It's apparent the chinese mafia wants revenge for something that happened in the past, but Akuha completely ignores them and tells Moka (in an extremely carrying way) that she's sorry to get her involved from something that involves her past.
The mafia is pissed that Akuha is ignoring them and tells everyone to kill. Within 1 second and a few swipes from Akuha, everyone is dead. She states, "If you hate me, then you should have come straight to me. You guys are clearly useless. Don't touch my most precious sister." Moka, who in the eyes of the 4th sister is the strongest (whose opinion seems to be unreliable now), is in utter awe of Akuha's strength. Moka thought. "She clearly displays such terrifying power, yet I'm in such awe of this powerful and overwhelming terror."
Akuha comes and hugs Moka and says, "Everything's fine. Let's go home."
Moka then thanks Akuha for saving her.
