Generally he regards Josh as a stable, reliable person--likely if he had any business with Tiger's Eye, the first person he'd go to would be Josh (and that's not just because he's the only person on TE Isa knows, it's also because he thinks he could probably trust Josh with whatever pertinent information he had). Isa is in general kind of a standoffish person, so he's not really keen on showing any kind of gratitude, but he thinks Josh is a good person to have around.

Reverse?