170,000-Year-Old Cicada Adult (17万年ゼミ成虫, Jūnana Man-nen Zemi Seichū, Viz: 170,000-Year-Old Cicada Imago) was a large Mysterious Being that attacked Z-City at some point during Saitama's training years. It was presumably killed by Saitama.
The Cicada Adult was an extremely massive cicada-like creature, easily able to cast a large shadow over a city. Located at the center of its head was a humanoid face.
Appearances in Other Media
Abilities and Powers
Since it was the grown-up version of the 170,000-Year-Old Cicada Larva, it was presumably much more powerful. Even S-Class heroes might have had difficulty dealing against it due to its resistant shell and its ability to fly.
Enhanced Strength: Due to its enormous size, 170,000-Year-Old Cicada Adult possessed great strength. Even 170,000-Year-Old Cicada Larva, a smaller and weaker version of it, had enough strength to defeat two A-Class heroes and easily smash through buildings.
Enhanced Durability: 170,000-Year-Old Cicada Adult possessed a resistant shell. Even 170,000-Year-Old Cicada Larva, a smaller and weaker version of it, was durable enough to easily smash through buildings without visible damage.
Flight: The Cicada Adult's wings allowed it to fly.