Simple categories matching mythological:

• animal,
• character,
• creature,
• idea,
• figure,
• beast,
• dragon,
• personification,
• unit,
• topic,
• theme,
• subject,
• being,
• critter,
• monster,

Members with property mythological:

• colossus,
• dragon,
• cyclops,
• loch-ness_monster,
• flying_dutchman,
• dwarf,
• medusa,
• oracle,
• monster,
• nature_spirits,
• harpy,
• frog,
• fairy,
• seven_hero,
• griffin,
• oni_demon,
• daphne,
• animal,
• brownie,
• argonaut,
• boogie_men,
• sea_monster,
• angel,
• demon,
• hart,
• serpent,
• basilisk,
• siren,
• witch,
• giant,
• prophecy,
• soma,
• devil,
• giant_scarab,
• satyr,
• grace,
• werewolf,
• fawn,
• fish,
• gnome,
• giant_ant,
• greek_titan,
• seal,
• olympian_god,
• stylized_design,
• circe,
• chimera,
• raven,
• turtle,
• atlas,
• myrmidon,
• camel,
• elephant,
• reptile,
• titan,
• griffon,
• goat,
• beginning,
• lion,
• unicorn,
• hairy_man,
• cyclopes,
• salamander,
• blind_assassin,
• boogie_man,
• mermaid,
• psychic_superstar,
• grim_reaper,
• stag,
• fantastic_bird,
• dionysus_motif,
• god,
• rainbow_serpent,
• chinese_dragon,
• infamous_goat,
• yellow_dragon,
• goblin,
• monkey,
• sphinx,
• nymph,
• manticore,
• eagle,
• horse,
• composite_beast,
• over_bird,
• love,
• samson,
• friendly_dragon,
• phoenix,
• frost_giant,
• ghost,
• leo_lion,
• flying_horse,
• fiery_dragon,
• hydra,