Ophiuchus (Eclipse)

Eclipse Ophiuchus is the main antagonist of Eclipse Celestial Spirits arc in Fairy Tail. She is a celestial spirits that is Yukino's property.

Eclipse Celestial Spirits arc
While Natsu, Happy, Wendy and Carla try to look for Leo, Ophiuchus appears and attacks them with thermometers, she explains about her Ophiuchus ribs, and that she had to come up with a number of unexpected things. She attacks the group using her Chart Cutter and Magic Stethoscopes and using the group's eardrums to hurt. She claims to be Astral Spiritus's admistrator and that she can control everything inside him, she continues her torture treatment, she then arrests Wendy and Carla on an operating table and tries to grab Natsu and fuses her feet around him to prevent her. However, Happy grabs him and pulls him away to rescue Carla and Wendy at the operating table, and before she can continue Leo appears and dismisses her, because the Liberum is already finished.

Then Ophiuchus reappears in a giant snake form and reveals that Astral Spiritus is her own body, she tells Leo, while preparing Liberum that he is very diligent, and refers to him with the Celestial Spirit King. After defeating Leo, Virgo and Libra the last remaining Eclipse Celestial Spirits. The group soon goes towards Ophiuchus in its giant snake form. She soon lets out an evil smile and reveals that she planned to seal all 12 Eclipse Celestial Spirits to empower the Eclipsed Celestial Spirit King, she says it all went to the Eclipsed Celestial Spirit King, while Lucy and Yukino destroy the Celestial Globe. Natsu with Happy's help manages to hit Ophiuchus with his Darkness Phoenix Blade by defeating her, then before Ophiuchus disappears in his human form with the torn clothing regrets his defeat and states that it was unfair to strike his instrument. She then returns to the spirit celestial world, where the Eclipsed Celestial Spirit King continues to absorb the 12 Eclipse Celestial Spirit and Ophiuchus, so when Natsu and the others arrive, the Eclipsed Celestial Spirits King sees them, and turns almost everyone into ribs, Natsu along with Happy enters the celestial beast and defeats him, with this the Celestial Spirit King, the 12 Celestial Spirits and Ophiuchus return to normal.