needs moar maw opening for the enderman, but I like it!
In all seriousness, Yukkuris would probably be unable to counter the enderman by the "ancient" technique of watching it from the corner of your eye (or basically not putting the crosshair over it in the FPV) since Yukkuris tend to face everything face to face, disregarding of what, which in game mechanics would translate as them always placing the crosshair on everything they meet.
By the way had anybody given a shot to The End world and the ender dragon bossfight?
I would have suggested backing up slowly while going back into it's nest, but... 1. Can Yukkuri even back up/move backward? 2. It's "barrier" is destroyed. Even if it did back up into it's home, the enderman could simply grab it as soon as and/or it turn around. 3. When certain condition are met, the Enderman could simply teleport right inside you fucking house?!?! Jesus just when you think your home sweet home will protect you for an enderman, it appears right inside you murder you.
A bit of fridge logic but if nest holes are sealed during winter, their holes have no lighting system, and Yukkuri can't see in the dark then how the heck do story like "Diamond Dust" play out when they would need to see to react the way they did?