Thread:Aldo The Fox/@comment-5724614-20150706022115/@comment-5951231-20150706022807

Well that is a screenshot of the spelling in the show. Usually, this is a credible source. But, if other official media contradicts this spelling then no.

Yokai is actually spelled different ways, sometimes with a u and sometimes without. But since this is the Romanized version and from the show itself, yes, the spelling should be changed.