The heroine of the series, Alice first appears as a chain that persuades Oz to form a contract with her in the Abyss. In fact, she is actually the infamous B-Rabbit (Bloodstained Black Rabbit), the strongest chain in the Abyss. Alice's goal is to find her lost memories, which play a major role in the story. In human form, Alice has long dark brown hair with 2 side plaits. She has a huge appetite and loves meat especially. She is hotheaded, loud spoken and says what she thinks without regard to the consequence. Despite this, she has a soft side, especially when Oz is involved. She hates when Oz leaves her alone, but to hide it she usually says, "I'm in a contract with you. You are my manservant, and as a manservant, what were you thinking, leaving me behind!?" or she just hits Oz and says, "Shut up."

"TK" is a mysterious character. He likes to speak nonsensical English phrases, depending on the situation of the scene, even though he does not know English fluently. He saves the team many times and knows some Japanese but rarely speaks it. Regardless, he seems to understand what the others say to him. He is talented in almost anything (his forte, dancing). He is usually always dancing even while in a fight with his enemies. His real identity and his name is unknown, even to the SSS. Therefore they identify him as by a nickname he gives himself, "TK." One particular trait of his is his inability to remain still, as he is in constant movement whenever he is not doing anything at all (although at times he can be seen not in constant movement). Also, his catchphrase appears to be "I kiss you!", or "Wild heaven".