I reckon the homeless man's dog 'Kiki' would've been pretty sad having lost his human. The scene ended with Kiki still barking at the water & isn't seen again, but I was left feeling pretty sad for the dog (though happy he was unharmed!)
Nah, we love and support our asexual queen Lilith. Except for the parts where they try to kill her, of course. (Spoiler jic: Lilith being the name of the shark in this film and it is revealed later in the film she reproduces asexually.)
Not any main characters. Police are shown providing supplies to a group of homeless men (they all have a great relationship). One of these guys is killed by the shark (off-screen).
MC opening scene is dragged to the depths (causing eardrum ruptures & other untold internal injuries) by the shark before freeing herself & just making it to the surface. In the catacombs slaughter scene 'Ben' is seen getting knocked out by others desperate to get out of the water, so I assume she either ended up shark chum (though that wasn't shown) or drowned. Also in that scene, a women is knocked over by others in the narrow exit & shown being trampled over underwater in the panic.