Part I: Cassandra Prime
Carrie Campbell was brought into the Niantic Project in order to analyze the connections between Exotic Matter and human language across history. Her research led to the discovery of an XM-exclusive language: Exogenous Glyphs.
Much like XM, Glyphs are capable of influencing the human mind at the subconscious level-though with Glyphs, they are able to transmit a particular concept, emotion or ideal. Combining various Glyphs can result in a "sequence" capable of transmitting thoughts or ideals that can be interpreted to cause even greater effects.
The events known as Cassandra Prime are regarded as the first Anomalies in the Osiris Sequence. They surrounded the struggle made by Carrie to stop the arrival of an Exogenous signal that could cripple human civilization-regardless of the cost.
Persons of Interest such as Oliver Lynton-Wolfe were present in certain Anomalous Events within the series attempting to manipulate the Anomalies to influence political institutions to support their Factional causes. Campbell believed that such activity would unleash the Exogenous Signal and rallied Agents to assist her to prevent its arrival. Agents from both Factions responded to her call, even going as far as to draw Exogenous Glyphs on themselves during the final Anomalies as a show of solidarity and support. Due to their efforts, the Enlightened found themselves the victor gaining access to Carrie’s Glyph Journal and her Factional alignment.
In my universe....Carrie didn't make it. She put her life on the line in order to make sure the Exogenous Signal didn't invade our world. 1218 Hank Johnson came to Osiris to do whatever was needed to ensure that Carrie survived this time. Thanks to everyone's actions...she did. For now, at least.