User blog comment:VedranTheII/Pretentious Diaries 3: Half-Grimm...do they even work?/@comment-7622429-20151013224919/@comment-25555436-20151014230704

Real eldritch creatures are things that seem to give reality and logic the middle finger, so at least to that extent they are eldritch.

They still fail at "weird/sinister/ghostly" though. And also lack the "it's form is something almost undescribable/completely out of this world" part.