but it is seriously up to you because sena could

a.) go full creeper

or

b.) proclaim that there's only one original kobato-chan and shun her

(until sena realizes she is a total qt in her own right which should happen like seconds after she meets kobato??? and then her convictions will crumble and it's back to full creeper)

...wait i was supposed to be offering you options that didn't end with full creeper