After mentioning that the winged creature's name is 'Keroberos', Tomoyo thinks that the pint sized flying teddy bear's name doesn't quite fit his image.

This episode, though not as dramatic as the first episode of the series, introduces the viewer the individuals that are important in Sakura's life. Primarily, Tomoyo, Sakura's best friend and cousin, is shown as being completely dedicated to Sakura to the point that she appears obsessive.

I purchased this lot of three backgrounds with layouts of Kero in an attempt to find a suitable background for another cel. So, I'm afraid that I have do not have much affinity for the artwork for this layout, especially since Kero looks more like a mouse and less like the flying teddybear that he so often looks like in the animated version. You can see a shortened version of the sequence below and how different Kero looks from the layout.

From Episode 2 - "Sakura's Wonderful Friend".