
In Haru's memory when she touch the other kitty. He/she was cold to touch. But when touch Hachi she felt he was still warm.

El pobre murió

*See here are Haru's memories of that other kitty
http://www.mangago.zone/read-manga/doukyonin_wa_hiza_tokidoki_atama_no_ue/nbt/e0552b5cb2c7e0c2/Vol1_Ch1/32/
http://www.mangago.zone/read-manga/doukyonin_wa_hiza_tokidoki_atama_no_ue/nbt/bc8ed8b4f1d82f39/Vol2_Ch55/8/
http://www.mangago.zone/read-manga/doukyonin_wa_hiza_tokidoki_atama_no_ue/nbt/manga/doukyonin_wa_hiza_tokidoki_atama_no_ue/c009.5/pg-5/

The unnamed kitten is dead due to the crows. Hachi was never found at the scene when Haru came back after she found food for them because Hachi was hiding in the box (which Nana saved him from later). The unnamed kitten will never appear again, except in flashbacks and possibly future cover pages. Everyone understand?
Oh noo so there is still one more kitty missing :(