Headcanon: Ruby's Pack
Ruby's pack is so not traditional in any way. For one thing, she's the only wolf in it. Well, okay, there is Granny, but her ability to shift forms is long faded although the senses remain. It mostly consists of Snow, Charming, Emma, Henry, Belle, and her handful of other friends*. For her pack, she would kill. For them she would die. For them she would commit murder, treason, theft, and any other crime she had to commit to protect them. For her pack, Ruby|Red will do just about anything. IF you dare to mess withany member or members of her pack, you'd best make yourself scarce during wolfstime, because Ruby will be coming after you. And you don;t want to know what she will do to you. What she did to Regina's guards to allow Charming to escape in Fairy Tale Land when he and Snow were taking turns finding each other will look like a simple case of wrong time, wrong place compared to what she will do to you.
*In verses where she knows more of her family (i.e. has siblings, knows her dad, her mother is alive, etc), they may or may not be part of her pack,depending on the circumstances and the state of their relationship with her.