Very lazy, not even an attempt to give a 5000 thousand years old recluse an actual mental condition fitting that. He acts like a slightly shy college student. Ironic when there are so many Japanese youths who develop various mental conditions after a few years of being a neet, like agoraphobia, paranoia etc. Plus no attempt to make his 5000 years old magic more complex than "make water appear or of thin air". Him having a taking dog is given as a solution to all these issues. As if someone wouldn't go insane taking to a dog for a few centuries, let alone 5000 friggin' years.