Diamond Tiara has everything she could ever want, except happiness.

Apple Bloom was a filly just like any other. But that all will change when she finds a peculiar ruby. Palaces? Shadows? Personas? Just what has she gotten herself into? At least she has friends, old and new, that will have her back.

Three years after Diamond Tiara's impromptu mission in Spain, she has become a guard in luna's royal guard. She hasn't faced many dangers since joining the guard, but that is about to change. This might give her a reason to reunite with an old friend

Because of a magical accident, Diamond Tiara is sent to another world full of blood, guns, and evil. Thankfully she meets a friendly human named Leon Kennedy.

It's exactly what it says on the tin.