A Swartzwalder, also known as Earrings Bear. On this page Gark is too far away the earrings that identify this bear to be visible. However, since only three bears came to the Big Rat Island, but a process of elimination, this one has to be Gark.
Eotain is almost certainly one of the Geisterdamen shown on this page, presumably the one looking directly at Othar and smiling. We know one of them is from the page for Wednesday, August 25, 2021.✣ And we know that Eotain has gotten to know Othar quite well, based on the events related in Othar's Twitter.