As reported by another player, HauN , some monsters in Grasscover Camp lack super-armor.
To be more specific, all elite-monsters AND bosses in the first three episodes of the first dungeon lack any sort of super armor, which in gameplay terms means that these kind of enemies have got Hard Armor, though the game does not display the usual writing.

Screenshots:
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This probably isn't the intended behaviour as the final boss of Episode 4 does have super armor and some "Electric Molocs" also do.