Only One

Only One is an entity created by the Four Beasts. As the Four Beasts, they were planning to create a new "Rapture Queen." However things did not end well as their creation went on a rampage and began attempting to absorb everyone on its path, including the Four Beasts themselves. This led to Gluttony going after Only One. Physically, she resembles Rapi when she was a child, albeit her pupils are star-shaped. When first introduced, Only One is quite aphasic, having problems producing speech that she can only utter incomplete words, and was only driven by the to attack and absorb everyone. However, following her defeat, Only One has an attitude identical to a toddler; she likes to eat a lot, even going after stealing other's food and somehow forms a bond with both Rapi and the protagonist, referring them as her parents. She can now speak, albeit only a few words. Only One asking the you for a hug.