Assassin, with Presence Concealment A, I should think.
OrionCursed Arm HassanMordredJackChachaShutenNeroIbarakiScathachMephistophelesArtoria
MusashiFemale ProtagonistJing KeFrankenstein's MonsterCaligulaNamelessSakura
Presumably ParvatiEnkiduIskandarElizabethTamamoMozartEreshkigalFionnFlorenceOsakabehimeOkitaNobunagaKojiroYan QingRaikoMoriartyKintokiNero
Presumably Nero Bride, from the white ribbon.ArashDrakeMarthaRobinHijikataYagyuCaligula
Two of him too.BlackbeardMedea LilyJeanne AlterMash
Presumably?Mash Two: Electric Boogaloo
Confirmed to be her in the related image.RomulusShiro
Presumably MuramasaIshtarJaguarmanMedusaAngraBedivereJekyllLancelotArtoria
Presumably Artoria LancerOzymandiasNitocrisGilgameshWaverMarieNero
Presumably Swimsuit Nero, from process of elimination.
Just ignore that Swimsuit Nero is supposed to be Nero Bride in a swimsuit.Romulus
Yes, there's two of him.Tamamo CatKiyohimeSansonD'EonDiarmuidShakespeareAndersenMale ProtagonistArtoria Santa AlterFergusCuAsteriosParacelcusScheherazadeAbigailJeanne Alter Santa LilyArtemis
Looking for Orion.LeonardoCaesarCleopatraNursery RhymeKid GilgameshAtalanteLoboMata HariBabbageAltera