English borrowed aegis from Latin, but the word ultimately comes from the Greek noun aigís, meaning “goatskin.” In ancient Greek mythology, an aegis was something that offered physical protection.

The spelling "Aegis" as appears in the original Japanese region titles is technically a misspelling of アイギス in English. The correct spelling, "Aigis" is the acceptable rendering of the original Greek. In fact, Aigis is the preferred spelling of the proper noun by contemporary academic standards.

It is then that she decides not to change the past, but to bear the burden of the protagonist's death and continue living towards the future. After defeating Erebus, Aigis fuses back with Metis, and returns to the person she was after the Kirijo Group repaired her, and decides to return to school with her friends.

Bodyguard Crush — Aigis has a crush on Makoto, and she will protect him at all costs. Though this is at first because Makoto has Death inside him, as she becomes more human, Aigis begins to protect Makoto for her own feelings. Chastity Couple - Makoto and Aigis can't be physically intimate due to Aigis being a robot.