Taru's rôle has been limited. She went to a festival with Shimamura (and with Shimamura's sister and the alien girl). Adachi saw them, got over-wrought, and cried incoherently to Shimamura over the phone, and remains anxious even though she and Shimamura began dating, but hasn't asked Shimamura who Taru is to Shimamura. Taru continues to connect with Shimamura; Shimamura hasn't told Taru that she and Adachi are dating, and Shimamura feels as if she's being somewhat unfaithful to Adachi in even continuing to be connected to Taru. I'm hoping that things evolve well for Taru, because she seems like a perfectly nice girl, placed in sad circumstances.