Noticed this when looking at the BM Golbez TMR. Probably missed some, but don't care enough...

• 23-Dec-2016: Pure Heart (Santa Roselia's TMR)

• 11-Aug-2017: Mechanical Heart (9S' 21O's TMR)

• 01-Sep-2017: Heart of Fire/Water/Wind/Earth (FFIII MK)

• 03-Aug-2018: A Lion's Heart, Winged Heart (Squall S/TMR, Rinoa's STMR)

• 14-Sept-2018: The Color of Heartlessness (Hyoh SE)

• 28-Sept-2018: Ravenheart (Malphaise's STMR)

• 05-Oct-2018: The Heart of a King (FFXV MK)

• 19-Oct-2018: Malefic Heart (Lilith's STMR)

• 23-Nov-2018: Mechanical Heart again

• 28-Dec-2018: Heart's Light (Sora's STMR)

• 04-Jan-2019: Heartless: Darkside (KH challenge event)

• 11-Jan-2019: Soaring Heart, Premium Heart (Tifa's S/TMR)

• 12-Apr-2019: Heart Overcoming Hatred (Kyanos' TMR)

• 03-May-2019: Heart Bound by Hatred (Black Mage Golbez's TMR)

What happened to you Gumi? You used to be so pure. Now in the span of one month, you go from overcoming hatred to being bound by it.