I have a portal where this happened:
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Player A conquered the portal, placed one resonator. Player A was listed as owner.
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Player B, C and D placed more resonators. B is listed as owner.
Currently there's still the one resonator from A, two resonators are from C, five resonators are from D. And two mods from B and one mod from C.
So how is portal ownership (for the Guardian badge) decided? Is the owner the player who initially conquered the portal and still has one resonator in it or can it change?
Best Answer
Portal ownership is designated by who the first person to place a resonator on the portal is. Even if all of their resonators decay, but the portal never goes unclaimed or flips teams, it will still count towards guardian days.
It is to note that the guardian badge will only count if you have resonators on a portal. Even if you have a 150+ day guardian that you own but you have no resonators, you will not get the badge until you upgrade one of the existing resonators to your own. Then the badge will pop.
As for your observation. There has to have been a time in which the portal was either unclaimed or the other teams. It is impossible for a portal to change ownership without changing color.