Sun-Kissed is a stat boost that affects the luck of the Kijikaiaku in artwork of it if it is daytime, and also decreases luck during nighttime.
Tier 1
+15 Luck in artwork depicting daytime, and -5 Luck during nighttime.
Tier 2
In artwork depicting daytime, +20 Luck, and -10 Luck during nighttime.
Tier 3
In artwork depicting daytime, +20 Luck, plus doubles most individual items found, and -10 Luck during nighttime.