NPCs composing that spawngroup :

a_siren_enchantress (33%)

NPCs spawning around that spawngroup :
(Max range : 100)

sirens_4, range=53 (-713,-646,-155)

sirens_48, range=51 (-640,-695,-152)

sirens_60, range=39 (-713,-662,-47)

sirens_98, range=43 (-668,-732,-58)

sirens_100, range=89 (-610,-733,-58)

sirens_102, range=52 (-639,-701,-58)

sirens_103, range=41 (-663,-665,-60)

sirens_104, range=82 (-614,-665,-60)

sirens_105, range=59 (-661,-644,-62)

sirens_106, range=91 (-616,-643,-62)

sirens_118, range=70 (-640,-743,-164)

sirens_142, range=40 (-682,-656,-68)

sirens_143, range=68 (-727,-753,-68)

sirens_145, range=68 (-638,-738,-25)

sirens_231229, range=39 (-712,-661,-47)

sirens_231274, range=92 (-615,-642,-62)

sirens_231275, range=60 (-660,-643,-61)

sirens_231277, range=56 (-644,-664,-60)

sirens_231286, range=82 (-614,-665,-60)