Henri "Henkka T. Blacksmith" Seppälä is the former bassist of the Finnish melodic death metal band Children of Bodom from 1995 to 2019. He is also responsible for backing vocals both in studio and live. In 2020 he announced he would be joining the band Moon Shot as their bassist.

Henkka is a very common nickname for Henri and seppä means blacksmith in English. The reason he has a T. in the middle of his name is his nickname being Torso.