I think I kind of figured out why Annna's name has three n. If you write アンナ in katakana through IME, you'd definitely have to press the letter "n" three times: twice for the letter ン "n", and once for the letter ナ "na". There is a high probability that the error simply stuck, making it a Throw It In!, or else, they just want the name to be different.
"Who needs a Wave-Motion Gun if you can teleport your enemy onto one?"
I think I kind of figured out why Annna's name has three n. If you write アンナ in katakana through IME, you'd definitely have to press the letter "n" three times: twice for the letter ン "n", and once for the letter ナ "na". There is a high probability that the error simply stuck, making it a Throw It In!, or else, they just want the name to be different.
"Who needs a Wave-Motion Gun if you can teleport your enemy onto one?"