[Western Crossover] The Drama Queen's Art of Deception

This idea came from combining two novels called Causing Trouble. I pay tribute to both authors, but I absolutely will not plagiarize them!

The general setup: A player of the FGO mobile game transmigrates with a System. Chaldea is in a different dimension, and Young Gilgamesh, the poster boy, gets thrown out of the System.

Three possible forms of summoning, as an initial setup:

1. Kaleid Liner’s Dream Summon (changes the user’s clothes and grants them some of a Heroic Spirit’s abilities, at 50% power)

2. Possession Summon, where a Heroic Spirit inhabits the user (the user is influenced by the Heroic Spirit’s personality, but their subjective consciousness remains their own, at 70% power)

3. Ten-minute limited battle summon (the Heroic Spirit has an independent consciousness, at 100% power)