>>46998664>>46998700At the end of the last update, we get a fourth-wall breaking "Heehee do you think you're in control I'm the one letting you play" all in lower case. Then there's this event in Glitch World, which raises Terra's affection.
Given Lin's indicated to be the final boss, along with things like "Weird psychic child cannot percieve Lin" and the fact Lin is meant to be killed by Ame, but instead, does the deed, indicates that Lin is somehow also breaking 'fate' or what not.
Hence, Lin=Terra, or at least that they're in cahoots, ot that Terra is the true final boss.