Now it's my turn.

After Jerco refused to aid the Titans and fled when they and innocent civilians were endangered, Robin’s stinging words of Jerco’s cowardice and selfish nature really struck him.

Though Robin understandably assumed that Jerco would just shrug his words off (as he naturally would), Jerco’s high respect for the titan caused the incident to leave an imprint in his heart.

Events later, there was an attacked which resulted in a terrible fire of a large building where nobody could get in or out of the burning inferno... except for a certain portal dasher we all know.

Taking Robin’s stinging words to heart, Jerco used his abilities to locate, and rescue the trapped victims, ultimately resulting in succumbing to the heat after saving the last victim.

Luckilly, Robin placed a tracker onto Jerco and found him before it was too late.

Remember in Jerco’s bio where it is stated that Jerco can only become truly visible through death (or opaque if severely ill or injured)?

Now you know his hair...