Yes, Scarlet's Remains is definitely a goth band because most of their albums belong to the Deathrock genre, which is a core subgenre of goth music. Albums like Scarlet's Remains, The Palest Grey, and Live At The Key Club - March 30, 2006 are examples of their goth sound.
One of the other goth artists that is similar to them is Christ vs Warhol.
Scarlet's Remains is located in United States, California, Los Angeles, active in 2003 — 2008. You can find more information about Scarlet's Remains on their GothDB band page.