The SI has an 'Enigmagnetic' Personality of sorts. You don't know quite how it works, but you know it works well. The ability to be agreeable even around people who can be downright caustic has its advantages. Even when meeting some of the other Senshi for the first time, you wonder how sometimes rough first impressions can be ignored. Perhaps its the no-nonsense attitude? But then, the way he can be so laid back. Maybe he just knows how to behave from experience.
Who knows, but the Senshi need to be brought up to speed, and being up to speed is all about information. And lots of it. Sometimes that information may prove to be a little crazy. But the SI hasn't gotten this far on sanity alone.