 The name Maturin itself is a reference to Stephen Maturin, a naturalist from the Aubrey–Maturin series of novels who discovers a new species of tortoise.Odetta/Susannah's godfather and guardian, retired president of the Tet Corporation, and protector of the rose.When he finally appears in "The Dark Tower", he is 100 years old, with a fiery, mischievous, and extremely likable character.