All I can say is, this really is an excellent matching mechanism.
Eliza counts as tsundere, but mainly because she has to act tsundere in order to maintain her chuunibyo.
Kreti, on the other hand, is a more textbook tsundere—orthodox, both proud and shy, and stubborn to boot.
When these two tsunderes run into each other, there's a natural, inexplicable bond between them, the kind where they're born to find each other an eyesore.
The fact they haven't actually started fighting can only be attributed to the respect they're giving Herbert.
If the situation weren't so special, Herbert wouldn't have sent the two of them out together when they're not even that familiar with each other.
But this time the circumstances are special, the opportunity is simply too rare; there's no reason to leave them behind.
After his initial proposal was "brutally rejected," Herbert submitted another, slightly less aggressive plan.
