If you want a guide that isn't GameFAQ's, I would recommend Neoseeker. I have used Neoseeker guides for every Cold Steel game other than everything after, like, halfway through Act 2 of CS4 because the guide is still being updated and they're amazing. Those guides are some of the best I've ever used, and it is mobile friendly. Here it is if you want it
https://www.neoseeker.com/the-legend-of-heroes-trails-of-cold-steel-ii/walkthrough