Basim's story is arguably the most complex of any protagonist, due to the fact he is a Sage of the Isu God, Loki.

Source: https://gamerant.com/assassins-creed-protagonist-tier-list-best-worst-altair-ezio/

In fact, Basim's struggle with the Djinni comes from a real-world experience of Beaulieu's: sleep paralysis.

Source: https://gamerant.com/assassins-creed-mirage-basim-mental-health-sleep-paralysis/

Many of Assassin's Creed's famous figures have serious meaning behind their names, and Basim's meaning is up there with the most memorable characters.

Source: https://gamerant.com/assassins-creed-mirage-basim-name-meaning-explained-comparison/