Mousepaw x Minnowpaw
Mousepaw and Minnowpaw are both apprentices in The Sight when Mousepaw displays his affections for her at a gathering. This pairing, in it's obviousness is doubtful to really go anywhere, since neither are main characters and any drama brought up could take away from the canon cross-clan, HeatherxLion. However, there's also the strong possibility that this pairing will not go anywhere because both sides are not interested. Mousepaw is obviously taken with Minnowpaw's downy fur and amber eyes, but she displays nothing more then friendship towards him.
But Mousepaw didn't hear [Lionpaw], "Minnowpaw!" he mewed. He was staring at a young gray-and-white RiverClan she-cat whose pelt looked as downy as kit fur.
The Sight, 134
Mousepaw spots Minnowpaw - he's obviously met her before, and he's staring at her and ignoring Lionpaw. This ship is particularly cute because of the way Mousepaw is a bit dopey, and doesn't even notice how annoyed Lionpaw is because of his attentions to Minnowpaw.
Mousepaw was staring at [Minnowpaw] with a wistful look in his eyes. "This is Lionpaw."
The Sight, 135
Speaks for itself. MinnowxMouse is so obvious most of the quotes do.
Mousepaw's eyes lit up. Clearly he liked the idea of a starlit stroll with the pretty apprentice. But Lionpaw would rather explore this place for himself, especially if Mousepaw was going to be round-eyed and moony over Minnowpaw the whole time.
The Sight, 135
Lionpaw again, is obviously aware of how Mousepaw feels, and the quote again speaks for itself. Mousepaw's behavior described as "round-eyed and moony" by Lipnpaw has been displayed in all the quotes above.
He padded away from the group and Mousepaw sighed, but followed him across the clearing.
The Sight, page 135
Lionpaw, the little devil, is dragging Mousepaw away from Minnowpaw! But perhaps this is an example of the speculation that MousexMinnow isn't really going anywhere. Mousepaw has the crush of a young apprentice, and being dragged away from her so easily is perhaps an indication of this.