Syaoran
... that the main protagonist from the manga series Tsubasa: Reservoir Chronicle, Syaoran, ends up becoming one of the series' main antagonists?
... that the main protagonist from the manga series <i id="mwC1M"><a href="./Tsubasa:_Reservoir_Chronicle" id="mwC1Q" rel="mw:WikiLink" title="Tsubasa: Reservoir Chronicle">Tsubasa: Reservoir Chronicle</a></i>, <b id="mwC1U"><a class="mw-redirect" href="./Syaoran_(Tsubasa:_Reservoir_Chronicle)" id="mwC1Y" rel="mw:WikiLink" title="Syaoran (Tsubasa: Reservoir Chronicle)">Syaoran</a></b>, ends up becoming one of the series' main antagonists?