Summary
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Obol Squad Member Trigger goes with Zenless Zone Zero in update 1.6, which suggests a focus on the mysterious fraction.
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Trigger has the stun role, uses electricity and seems to have a large rifle as her weapon chosen.
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Silver Soldier Anby's reveals in update 1.6 Sparks Theories about her connection to Soldier-11 and Obol squad.
HoyOver confirms Obol Squad Member Trigger as another new limited banner character that joins in Zenless Zone Zero Roster in update 1.6. There is no slowdown for Hoyoverse because the developer has already started teasing the next big Zenless Zone Zero update.
The pattern has become quite predictable for Hoyoverse, which usually starts to tease the next update after the launch of the current one, in this case update 1.5. While fans have just got their hands on the Astra-Nomical Moment update with Astra-Yoo, Hoyover players give a chance to start replenishing resources such as polychrome and encrypted master bands as 3 new characters have already been confirmed for the next major update.

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Zenless Zone Zero diagram shows polychrome count for version 1.5
A zenless zone zero infographic shows players how many polychrome will be available to acquire throughout version 1.5 update.
After a pair of update 1.6 characters reveal to Zenless Zone ZeroHoyoverse announced that Trigger is another limited banner character that joins the list in update 1.6. While Pulchra seems to be an A-rank character, it is expected that trigger and silver soldier Anby will be part of S-Rank banners. For Trigger, she occupies the stun role and uses electricity as her choice. Her Agent Record Animation also shows her with what seems to be a big rifle, which probably takes aspects of Harumasa's playing style by being able to hurt in range while moving in for melee strikes as well.
Zenless Zone Zero Update 1.6 can focus on the Obol squad
Trigger's Reveal seemingly paired well with a theory that many fans have had since the game launched surrounding the origin of Zenless Zone ZeroAnby Demara, an Electro Stun agent who is part of Nicole's cunning Hares fraction. Hoyoverse revealed silver soldier Anby as a new limited agent for update 1.6, giving her a new look and attacking designation, while an unintentional leak revealed that this version of her is part of the Obol squad. With all these revelations, fans have continued to link Anby to Soldier-11, perhaps for a long time lost sisters or at least related in some way considering how similar they look to each other.
Compared to others Zenless Zone Zero Fractures that have been in the limelight recently, as well as the sons of Calydon or section 6, Obidian Division, or Obol Squad, remain largely mysterious and a little used to this point. The only real link since the game was launched has been with S-Rank Agent, Soldier-11, which has been available as part of Zenless Zone ZeroPermanent banner and has a prominent story called Mole in the Hole. With Trigger on the horizon, Hoyoverse is perhaps ready to reveal more about this little known fraction.