Icari’s father, Eetori wants to change the tide.
When people say everything happens for a reason,
what I think they really mean is there are consequences to everything that happens. For good or ill, Eetori had an idea after the battle in Chapter 4. Lye was just being creative to survive when she used a vine to slingshot a spear into the enemy, but it was something Eetori had never seen before. His imagination was sparked. It may seem like a trivial thing right now but this is going to be something to pay close attention to.
I seem to recall a certain animated anthropomorphic coyote having a similar problem with his bows.
haha. True enough.