Familiars/Animal Sidekicks

Su Luxia is a "host" a person that enters small world and enacts revenge for supporting female characters wronged by the MCs. She has a small gerbil like sidekick that helps her, he's a "program". Honestly this is pure awesome!

A girl, a summoner, who died in her first live awakes up to find herself a year in the past. Determined not to end up like that again she cuts a new path. Her summons are a big wolf creature, a black rabbit, a pink fox, and a phoenix.

A girl died via fire in her previous life and reincarnates into another world with the gift of magic. She decides to become an elementalist because she doesn't want to work and the spirits do all that for her. Her first summons is a metal spirit that later takes the form of a snake.

There's a dragon mount! Finna is SO cute!
FL is sold into slavery and one day finds and the injured ML. She helps him and in return he tries to help her.