Giyuu was trying to mind his business like everyday. But then shinobu comes and annoys him like she always does. Giyuu absolutely hates shinobu in every way. Couldn't she shut up and not be annoying for one second? All the hashira were hanging out in the garden when giyuu finally had enough and snapped at shinobu.
Shinobu: "You know Tomioka-san this is why no one likes you, and why you have no friends."
Giyuu: "Cant you shut the fuck up for one second?! God you're so annoying! Go bother someone else with your fake ass smile and cheap personality! This is why i don't want to be your friend Kocho! Because you're rude and ignorant! Just go drop dead already." Giyuu says as he yells as her and walks away in anger not wanting to deal with any of them.
The other hashira look at giyuu in complete shock. He was always so reserved and quiet. No one knew he had all this pent up anger. Shinobu gets furious about this. She always won with him and this time she was the one who had gotten humbled by him, and she didn't like it one bit.