A (Venonat)

A was a Venonat caught by Red in the Safari Zone of Gen 1 (Pokemon Red). A was the first victim of Bloody Sunday, being released before a Geodude and Zubat were captured.

Personality (Lore)
Not much is known about A's personality as he was sent to the PC upon capture in the Safari Zone. It is uncertain whether A followed the Church of Helix or Disciples of Dome. In some interpretations of Bloody Sunday, the twelve Pokémon lost were sacrificed to allow for Lord Helix to return.

Release
During the events of Bloody Sunday, on Day 10, while trying to retrieve Zapdos from the PC, A was selected for release. On the first attempt to withdraw AA-j, A was released, being the first of twelve Pokémon lost on Bloody Sunday.