Adventure Time: Rurouni Kenshin

Cast Olivia Olson as Marceline Abadeer Jessica DiCicco as Flame Phoebe Jeremy Shada as Finn John DiMaggio as Jake Martin Olson as Hunson Abadeer Fred Melamed as Gumbald Maria Bamford as Lolly Tom Kenny as Simon Petrikov/Ice King/Chiche Lauren Lapkus as Patience St. Pim Hynden Walch as Princess Bonnibel Bubblegum Steve Little as Peppermint Butler Justin Roiland as Earl of Lemongrab Niki Yang as Lady Rainicorn/BMO Brett Gelman as Ringmaster Rebecca Sugar as Marceline's mother Keith David as Vampire Overlord Theme Songs "Marceline: Vampire Hunter - Linkin Park - Castle of Glass (cover by Olivia Olson) "Marceline: Dawn of Gumbald" - Linkin Park - The Catalyst (cover by Olivia Olson) "Marceline: War for St. Pim" - Linkin Park - One More Light (cover by Olivia Olson)