Hardness ratio, defined by the count rates in the 3.0 − 6.0 keV and 0.3 − 0.6 keV bands, plotted against their combined count rate. Each data point represents a single XRISM orbit (5747 s). The data are color-coded by flare phase: pre-flare (black), rise (red), decay (blue), after-flare (magenta), and post-flare (orange). Gray points indicate observations outside the main soft flare.