When Subaru was first introduced way back in chapter 48, I was hoping that she would become a rival for Chiyo so that Chiyo might realize that Igarashi was not the useless, dimwitted buffoon that she treats him as and that, unlike her, other girls might actually find him attractive. Alas, Subaru had a boyfriend, and we didn't see her again until a very brief, half-panel appearance in chapter 69. However, she did show up again in chapter 89 as one of the two girls that Igarashi's senpai from work invited to go to karaoke (odd that she would agree if she had a boyfriend). And now, she shows up again. Maybe, just maybe, my wish will come true. Of course, there's still about 0.00% chance that Igarashi would be swayed by her feminine wiles, seeing how Chiyo is his goddess.