r: alice...alice...r: yu!?m: Reimu can let mister dog eat her slowly!Marisa can then escape!r: yuyu!?why!? why marisa?!r: Marisaaaa!!Pim: Why are they coming this way!?
worst tactic ever - even yukkuris themselves have the instinct to chase things moving:'mr butterfly' for example.
Or maybe they have an instinct to chase "easy" things and "take it easy", which sets the stage for them to do completely bizarre things( from our perspective) in the pursuit of this "easiness." Remember, their desire is not to survive but to take it easy; it may seem like one and the same but it's not.