>>41847148>>41851242In the first video for example
https://files.catbox.moe/vzpc1c.mp4The backrow characters play their own part despite not participating in the battle. On the far right we have Cyrus, the Frog ripoff, who is a Katana user with the Eastern personality. He's equipped with special gear called Grasta which buffs Katana users Victor and Melissa in the frontline, and the Eastern personality Kikyo. Beside him is Nagi, an Axe user who shares even more grastas with the Axe using Kikyo. Without this backrow (or similar characters filling the same role) the frontrow wouldn't reach the boss' HP Stopper during the AF, and would get killed immediately after.
In the third video
https://files.catbox.moe/urod7a.mp4Morgana from the video game Persona 5 switches with Akane in the backrow. This activates Akane's "Valor Chant" which is basically a special move, typically a buff or debuff, that only applies when a character moves from the back to the front. This gives her +40% PWR and +40% SPD for 3 turns. Note that the AF counts as 1 turn, so she gets that +40% PWR for 7 of her attacks, not just the first 3.
