Maintenance for the week of November 10:
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• PlayStation®: NA and EU megaservers for patch maintenance – November 12, 4:00AM EST (9:00 UTC) - 12:00PM EST (17:00 UTC)
So was it ever determined what gives +5 Sharp rapport on log-in?
... I have searched the discussions and couldn't find anything conclusive, to the point "logging on with Sharp summoned while in the zone you didn't log in with him summoned yet" seems almost the most plausible...