>>280185158
1) Her "cheating" wasn't explicitly banned, it was merely unsportsmanlike
2) Yukari cheats as well, regularly so, and unlike Arisa, her commander doesn't reject the fruits of the cheating.
In fact, Saunders did Ooarai a favor by not changing their plans despite exposing Yukari as a spy.
If Kay had decided to come at Ooarai with all of her tank at once, Ooarai would have been doomed and the show would have ended there. Remember that

>>279796469
Nope, it's the right way to do things.
The less sex the better