The cell number that Alexandra Trese calls to summon the fire elemental Santelmo is 003231870, which is the date of the Great Binondo Fire (March 23, 1870)
To get information, Trese bribes the Nuno sa Manhole with Choc Nut, a chocolate peanut candy snack popular in the Philippines.
Aswang is an umbrella term for various shape-shifting evil creatures in Filipino folklore, such as vampires, ghouls, witches, viscera suckers, and werebeasts (usually dogs, cats, pigs). Spanish colonists noted that the Aswang was the most feared among the mythical creatures of the Philippines, even in the 16th century.