Love Interest
Tsukune Aono
Outer Moka's first friend and love interest. She loves drinking his blood. Moka grew to care deeply for Tsukune since their first meeting, doing whatever she can for him. As time passed, her bond with Tsukune went from clingy friendship to love. She almost heard Tsukune declare his love for her on his birthday, but the arrival of the rest of their friends ruined the moment. Moka loves Tsukune with all her heart, wanting to spend her life with him; she's declared this once when the Graffitti Demon got Tsukune framed, and secondly when they finally share a kiss.
Inner Moka seems to have feelings for Tsukune as well, but how they are expressed and how they develop is more complicated. It's through Tsukune that Inner's ice-cold heart has begun to thaw, and as a result, makes her kinder. She knows how much Tsukune means to Outer Moka, so she does whatever she can to ensure he lives. It's found that Inner is falling in love with Tsukune throughout Season I and more openly through Season II, but is too stubborn (and concerned) to admit it. The first vestiges of her feelings are shown in Tsukune's first descent into a Ghoul, where first Inner Moka desperately tries to protect Tsukune by trying to turn him away, and then by her emotional and grief-stricken reaction to trying to kill Tsukune to prevent his ghoul form from committing atrocities, even though in her own mind she would have wanted him alive even as a monstrosity. Against Hokuto she takes severe damage trying to protect Tsukune and once again tries to push him away to protect him, before getting caught up in the moment and grinning when she reflects on how self-less Tsukune is. Her protective nature continues, however, as she tries to push him away once more by going after the Ritsu Mirror during the Riot, arguing that with the mirror Tsukune would no longer be caught in the crossfire of her battles.
In Season II these emotions become clearer: She smiles whenever she reflects on Tsukune and is emotionally frantic around him, lashing out in embarrassment or breaking out into a shy smile or blushes as she tries to maintain her cold and aloof personality (to no avail). However her fear of losing Tsukune continues to make her consider abandoning him, until when Tsukune reunites with Inner Moka at Fairy Tale Headquarters he promises to help her in her battles and that she no longer is alone, a proclamation that finally ends Inner Moka's regret and doubt for being involved in Tsukunes life. Throughout the battle against Akuha, Inner Moka is stunned by Tsukunes growth as a character and they finally take to battle together, synchronizing perfectly to dispatch her older sister. Inner Moka's love and care for Tsukune is explored deeper when she gets down on her knees and begs Gyoruko to save Tsukune in order prevent him from completely becoming a ghoul, an act considered unspeakable to a vampire, a species that are known for their pride. This act reveals how Inner Moka still heavily blames herself for Tsukune's worsening transformation condition, from his first decay into the ghoul state to the final battle against Gyokruo. Tsukune however absolves her of her guilt, affirming that he would never regret meeting her or what has happened to this point, freeing her own regret and self-hatred that had prevented her from expressing and affimring her feelings to Tsukune. Throughout the final battle against Fairy Tale both are seen to work perfectly together, having full trust and confidence in each other's actions. The share their emotions as well, as when Outer Moka/Akasha dies, as Inner Moka embraces Tsukune as they both mourn her passing together.
Ten months after these events, Inner Moka and Tsukune are clearly close, and she continues to pester Tsukune to drink his blood, stating his blood is still delicious as a vampire. Although does not stop comical moments between the two when the rest of the harem chase after them and try to upend Inner Moka's monopoly on Tsukune, Inner Moka plans to stay by Tsukune's side forever after he managed to become a Shinso Vampire.
Friends
Yukari Sendo
Close friend of Moka's who is in love with her, and wishes to be in a three way relationship with Moka and Tsukune. Because of such, this is one of Moka's more awkward friendships. At times, Yukari has even groped Moka, and finds her highly attractive.
Ginei Morioka
The Newspaper Club's president until the Epilogue; he initially sought to date her, but has stopped thanks to a beating from Inner Moka.
Ruby Tōjō
She at first was an enemy from Witch's Knoll. Out of all Moka's rivals for Tsukune's heart, Ruby is the least mean to her.
Kurumu Kurono
Outer Moka considers Kurumu her best friend, but is her most frequent rival in squabbles over Tsukune. At times, they help each other out when they're having a mental struggles. Inner Moka initially hated her, for attempting to take away her food supply - Tsukune. However, by the end of the manga they are close, to the point where Kurumu almost convinced Moka to allow her to dive into Tsukune's dreams to become his lover in his dreams. However, this agreement hilariously derails when the rest of the harem tries to seize the opportunity and Moka withdraws her support.
Mizore Shirayuki
At first they were enemies, but later on, they became friends and rivals. Mizore really gets in the way between Moka and Tsukune (usualy by tossing kunais made of ice between them), but not as much as Kurumu.
Shuzen Family
Akua Shuzen
Moka's oldest half sister. Moka considered Akua an enemy at first, but that changed after Moka discovered Akua's reason for protecting her.
Kokoa Shuzen
Moka's younger half-sister. Outer loves and fears her, while Inner loves and is annoyed by her.
Kahlua Shuzen
Moka's older half-sister. Both fear her madness; Outer dislikes the babying she is given.
Gyokuro Shuzen
Moka's stepmother. She absolutely hates Moka and her mother.
Akasha Bloodriver
Moka's biological mother. She and Moka love each other very dearly.
Issa Shuzen
Moka's father. He loves Moka and her sisters, to the point of being "Massively Overprotective".
Other
Shizuka Nekonome
Shizuka Nekonome is her teacher.