i think the kid you see in the dream zaanekind (howerver its spelt(tierd lol) is tidus younger selth. also tidus might be the way the fayth rember shuyin to be. shuyin did die in bevelle infront of vegnagun. shuyin's memory got stuck in that "den of woe" place. the true consesnus on shuyin was also trapped there and later posessed nooj then barali. this could of happend because the cave was used to burey people that might become fiends and only shuyin became one. the thing with the dress spheare is that lenne consusnes got trapped inside it and reacted to shuyin making yuna look like her to shuyin.