Iono Feria, also translated Ion-Faeria or Iona Faria and sometimes referred to as Butterflies, are creatures Samus encounters on Zebes during her adolescent years. Iono Feria absorb moisture, ionize it, and use the resulting energy to fly.
Samus first encountered the Iono Feria while brooding with Pyonchi after an unfruitful training session with Old Bird and Gray Voice. She followed them into a blooming valley and fed them juice. She proceeded to pick some of the flowers growing in the valley and show them to Gray Voice, who informed her that they were extremely poisonous Badger Clover. When Mother realized the Iono Feria were responsible for bringing the Badger Clover to Zebes, Gray Voice ordered the Iono Feria and the Badger Clover to be burned.
- "Iono Feria...It absorbs moisture, ionizes it, and uses the energy to fly." —Metroid (manga), Old Bird, Vol 1 Ch 2 Pg(s) 13
- "Here, juice!! Let me join you guys - ah ha ha. Don't panic!! There's plenty." —Metroid (manga), Samus Aran, Vol 1 Ch 2 Pg(s) 16
- "Ah, Gray. Look, I found these flowers blooming in the valley. Aren't they pretty!" —Metroid (manga), Samus Aran, Vol 1 Ch 2 Pg(s) 18
- "Th-those are Badger Clovers?! Where is the valley? Samus!! Don't you know, that is a plant from another planet. It's terrifyingly poisonous!" —Metroid (manga), Gray Voice, Vol 1 Ch 2 Pg(s) 19
- "Reporting. Traces of an alkaloid detected on the Iono Feria. They were the carriers. Danger!!" —Metroid (manga), Mother Brain, Vol 1 Ch 2 Pg(s) 21
- "Oh no. Clean up crew, immediately divide into pairs and burn everything!! The Badger Clovers and...The Iono Feria!!" —Metroid (manga), Old Bird, Vol 1 Ch 2 Pg(s) 21
- "They're entering defensive mode! They're using weapons left by the Space Pirates!!" —Metroid (manga), Mother Brain, Vol 1 Ch 2 Pg(s) 23
- "I'll stop them!!" —Metroid (manga), Samus Aran, Vol 1 Ch 2 Pg(s) 25
- "What...She's only aiming for the weapons..." —Metroid (manga), Gray Voice, Vol 1 Ch 2 Pg(s) 26