Episode 12
OOO fights the Ageha Yummy and Goto tries to help out by using a bazooka. They are eventually able to corner the Yummy. Ankh faces a minor dilemma. Goto thinks he should be the only one protecting the earth and starts to change his attitude towards Eiji. Because he's obviously jealous that he's not the main character.
Episode 13
The greed of a self-proclaimed genius surgeon turns into a Yummy. Eiji and Ankh infiltrates the hospital after they sense the presence of the Yummy.
Episode 14
Ankh separates from Shingo's body which leaves him at a risky state if they are separated for to long. Eiji and Ankh decideds to look for an answer. They seem to make progress.
I guess it's because they are preparing for TaJaDoru and making Ankh's body complete.