It's eventually revealed the Renans are not so much aliens as much as they are Dahnans capable of Astral Artes, kidnapped by the Helganquil, modified, and made to live in Lenegis as such, the invasion could be said to be an alien invasion by proxy for the benefit of the Helganquil after the first Spirit Channeling ceremony failed.

Alien Invasion: While Renans are human, they pretty much did this 300 years ago to Dahna- and very successfully.

The situation is mitigated somewhat once you unlock the Fishing game and access to the lucrative fishing spots, but you'll still be hurting for money until very late into the endgame. In addition, enemies don't drop Gald outright and you have to figure out what drops to sell, and even then, they don't sell for very much. For most of the game, you're not even capable of buying useful recovery items like Orange Gels for Cure Points (and thus, healing or buffs), and even then, you're often without enough money to buy more than a handful of them.

Adam Smith Hates Your Guts: Perhaps appropriately enough because Dahna is under Renan occupation - or just recently freed from it, as the party travels through places - but supplies and Gald are extremely hard to come by, and trying to buy anything rapidly gets quite expensive.Shionne a heroine who takes charge and wields a rifle, Rinwell has absurdly powerful magic, and Kisara is a knight who jumps into the fray with her mace and shield. Action Girl: Shionne, Rinwell, and Kisara are all this.This thankfully does not affect the party's money supply at all. Acceptable Breaks from Reality: Several skits mention things like Dohalim spending a lot of money on something useless.

Kisara tales of arise