Episode 37 "Armor of the Heart" Edit
During the Tower of Heaven arc, Natsu and his comrades storm the eponymous Tower of Heaven to rescue their friend Erza. As he ascends, he encounters Fukuro, a strange man or creature with the body of a man and head of an owl. Fukuro opposes Natsu and the two fight.
In episode 37, Natsu and Fukuro's battle continue. They appear evenly matched until Fukuro launches his missiles at Natsu. The missiles catch Natsu and spin him about, giving him motion sickness. With his prey weakened, Fukuro rushes towards Natsu as he falls to ground. Fukuro opens his mouth wide and swallows Natsu whole, explaining that he will digest Natsu and absorb his magic.
Right after Fukuro swallows Natsu, he is challenged by Gray Fullbuster, one of Natsu's comrades. Fukuro attempts to eat him as well, but Gray fends him off and defeats Fukuro, relasing Natsu from his belly.
- This scenario is adapted from chapter 88 of the Fairy Tail manga.