Dmitri's newly adopted orange cat, left behind when the collapse began one day later.
Dmitri says he had wanted a cat while growing up and finally adopted Kapitan Whiskers just before Earth entered the crawl. The orange cat was alone when Dmitri disappeared.
The loss explains Dmitri's strong emotional investment in Donut and his admiration for Carl's effort to save her from the cold.
An ordinary orange domestic cat.
Kapitan Whiskers connects Dmitri's pre-collapse grief to his attachment to Donut.