It is ABSOLUTELY ESSENTIAL for Arnelle to stack boost cards for her DEF
Arnelle also needs healing though because she will lose health when enduring many combats
Arnelle is a decent brawler due to her high ATK stat.
Arnelle has very similar stats to Kai, just losing a little DEF for a bombshell of a hyper.
Arnelle can make unique use of cards with card-draw effects such as Nice Present and Passionate Research by making use of her passive to find the most opportune time to use them and draw specific cards.