Auron had endured Jecht's presence at Braska's request.
Auron had appreciated Jecht's presence from the first time Jecht made Braska laugh. They'd sat together, Jecht's head thrown back and laughter ringing out, and Braska next to him, chuckling to himself and looking almost happy. Auron almost felt grateful when he saw them - Auron could and did do everything in his power for Braska, but he couldn't have made Braska laugh when he knew what was waiting for them.
Auron had enjoyed Jecht's presence at times despite himself. When Jecht could finally use his sword well enough that they could spar; when they sat outside the Chamber of the Fayth and Jecht started to sing the Hymn with the reverence of a priest; when Jecht sobered up enough that he could stand to talk about something that wasn't himself or his family; when Jecht played the hero and actually lived up to his claims; when Jecht managed to get himself struck by lightning.
Auron had liked Jecht. He'd thought that after Zanarkand, Jecht would be all he had left.