DPC is showing a pattern of behavior with Quinn and that is not speculation. She is deceiving the people who were presented to us as her friends. Riona, Sage, Tommy and possibly in the past Vinny. This is not a speculation, but a factual one, which is canonical. Ergo, a pattern of behavior. Because it is canonical, it doesn't matter if I play DIK, THIN, NEUTRAL or CHICK. Likewise, it doesn't matter if I play every path or just one. Quinn's behavior pattern towards her friends remains the same. Based on that, you can conclude what could happen to the MC as well, but doesn't have to.