The three support items and the Imperial Regalia of Japan
I just realized that the three support items mirror the Imperial Regalia of Japan.
Face of the Mountain reflects the mirror, Yata no Kagami... PUN INTENDED.
Talisman of Ascension reflects the jewel, Yasakani no Magatama.
Frost Queen's Calm reflects the sword, Kusanagi no Tsurugi.
Was this a massive coincidence, Riot, or did I discover where you drew your inspiration for the items?