It is possible to get a pre-emptive attack on Aps, unlike against most other bosses. Attacks to the back of Aps inflict quadruple damage, as opposed to the regular double for the majority of enemies. Aps is weak to Fire.
Sewer Tsunami is Aps's strongest attack, but it damages Aps as well. The tsunami can come either forward, which causes more damage to Aps (between 180-192 HP) than the party, or backward of party, which causes more damage to the party than Aps (between 45-48 HP). It is used at certain points in the battle, as well after being hit by a magic attack. Aps's Lick attack inflicts Sadness, which reduces damage taken but halves the speed party's Limit gauges fill.
- The "2nd opponent" refers to the middle party member, usually Aeris if the player doesn't swap character positions.
- Aps has two different flinch animations: one for the Sewer Tsunami ability and one for all other attacks.
Abzu, also known as apsû, was the name for the primeval sea below the void space of the underworld (Kur) and the earth (Ma) above. It may also refer to fresh water from underground aquifers that was given a religious fertilizing quality. Lakes, springs, rivers, wells, and other sources of fresh water were thought to draw their water from the abzu. In the creation epic Enûma Elish, Abzu is depicted as a deity—A primal being made of fresh water and a lover to another primal deity, Tiamat, who was a creature of salt water.
Aps's artwork specifically confirms its named after the Mesopotamian God. (アプス（メソポタミアの神様の名前です), Apusu (Mesopotamia no kamisama no namae desu)?, lit. Abzu (it is the name of a Mesopatamian God))
- Aps is the first "non-robotic" boss faced in the game.
- Aps also a tattoo similar to Don Corneo's in its artwork, which is absent from its in-game model: a heart with a sword through it, bordered with the text "Colneo's[sic] Pet No. 002", "son of a bitch", and "kill". too small to read