Remember those rumors and ideas being brought up about the cat warframe that was just a big joke? Well, I think it showed up in the last batch of helmets with trinity. :
Trinity Aura Helmet | WARFRAME Wiki | Fandom
Rhino][Trinity] a couple of slayers : r/WarframeRunway
WARFRAME - Trinity Prime Gameplay Intro (PS4) & Abilities - Walkthrough - Part 211 | xxSnEaKyGxx - YouTube
Steam Workshop::Ancyra Helmet v.2- Trinity
If you put null star on trinity, you can use the arcane aura helmet to get a 19th star, making the 90% DR cap finally have any affect : r/Warframe