Haruka was apprehensive vs Soccer Senpai not because he reminded her of Tachibana, but just because they have had problems with the soccer club over school territory. She sees him as an enemy of her club.
WiruSenpai
2019-02-26 20:54:13 +0000 UTC
In the Japanese language a gender is not specified when she's thinking about inviting Haruka to the festival, so we are meant to think that she is inviting Kondo. She said something like "since we're friends, would it be ok to invite her/him" But her thoughts are actually a call back to what Haruka said to her about their friendship being about more than just track.