Erika of Plus Situation is Shana - she even uses the catchphrase "Urusai! Urusai! Urusai!" in just about the same fashion.
She turns into Hayami or Yuuhi (depending on who you're more familiar with) in Plus Communication though.
(Apologize in advance for yet ANOTHER bullet). Interestingly, the latter character mentioned in the previous bullet is a role that both of Erika's voice actresses have in common.
The Other Darrin - Just like its predecessor, cast swap-outs were in order for the all-ages versions and adaptations, although not to the same degree. A good number of characters kept their original voice talents.