Ultraman: Should I Lend My Light to Gatanothor from the Start?

Transmigrating into the Ultraman universe, just as the battle between Tiga and Gatanothor reaches its fiercest point.

Everyone lends their light to Tiga.

Everyone except Su Chen, whose hand slips and lends his light to Gatanothor instead???

Bro, what kind of unforgettable darkness did you experience in your childhood?