What could be cooler than a guy with long hair, a sword, and poofy sleeves? A guy with all the above and an owl! How cute!
I haven't found this cel in the show yet, but it shouldn't be too hard, since Allen's owl is sadly absent from the entire middle of the series.
There are two layers, with Allen and the owl on one layer, and Gaddes and his ox-creature on the other, continuing behind Allen (you can see the feathers on the ox-creature's tail sticking up over Allen's shoulder).