Persona 5 Royal
52 Achievements
1,000
100-120h
Accident-Prone
Performed an execution during a Fusion Alarm.
15
18.53%
How to unlock the Accident-Prone achievement in Persona 5 Royal - Definitive Guide
Once the cutscene's over, go ahead and do any - be it turning Persona into item, creating personas or such - and the achievement should pop.
I got it after turning 'throwaway' Persona into a item, so you can always summon cheap Persona and turn it into an item if you don't want to get rid of your Personas at that time.
If you miss it during the tutorial, fusion alarms can be triggered by ambushing many enemies in a row and performing well in battle. There is no specific meter to view to see how close you are to triggering an alarm, but it isn't very difficult to do.
*MISSABLE*
Fusion Alarms are scenarios where the fusions are altered and new abilities can be learned outside of the normal range for a particular Persona. During a Fusion Alarm, the Velvet Room is coated in red and the fusion results change. Fusion Alarms are not random, but rather occur by filling up an invisible 'meter' by catching shadows by surprise and performing well in battle.
When a Fusion Alarm is activated, you'll see a Velvet Room cell door appear on screen and start glowing red. You can then make your way back to the Velvet Room from whatever location you're in and participate in fusions during the Fusion Alarm.
This trophy involves performing any fusion or execution during the Fusion Alarm.
You are first introduced to this while exiting Kaneshiro's palace after reaching the treasure. This is fixed and will happen every time, so this is an optimal time to earn this trophy. The name of the trophy may mislead some into thinking a fusion accident is required for the trophy. It isn't. Any fusion during the heightened fusion accidents conditions will unlock this trophy.
If you want a Fusion Alarm to go away, you can speak to the Velvet Room attendants next to the cell door in order to deactivate it. Just be sure to earn this trophy first.
The trophy will unlock as soon as you use an execution during a Fusion Alarm for the first time. Below is a video showing the Fusion Alarm's activation and fusing while it is activated:
https://www.youtube.com/watch?v=M_RssHm0CuA