Tuoni is a figure from Finnish mythology, often associated with the underworld. He is considered the god of death and is linked to the realm of the dead, known as Tuonela. In this mythological context, Tuoni is depicted as a dark and mysterious figure who guides souls to the afterlife. In Finnish folklore, Tuonela is described as a shadowy place where the spirits of the deceased reside. It is often portrayed as a river that separates the living from the dead. Tuoni's role emphasizes the cultural significance of death and the afterlife in Finnish traditions.