[LROlsson]

Originally Posted by ozer22

What did Kuon doing when Yamato invade Tsukuru?
Did she just obediently accompany Haku to the battlefield?
Did she meet Kurou when Haku fight against him?

Spoiler:

She was conflicted, but she decided to go with Haku and gang instead of staying in Yamato.
Haku didn't have a direct involvement in the invasion, he was sent by Oshutoru to give supplies to Munechika since Tuskuru had cut of Yamato's supply route.
Kuon did help them by telling them a route that Yamato didn't know about so they could deliver the supplies. At this point, Kuon was surprised that Haku didn't doubt her words a single moment when she told them the route.
Haku didn't take part of the battle directly either, his gang was later sent to take back supplies that Tuskuru had stolen that were stored in a storage, and it was there they met with Kurou, and yes Kuon was with them.