You could just make them into one json:
{
"character" : {"AttackPower":10,"Boss":"res://Bosses/SkeletalArcher.tscn","Character":"res://Characters/PitFighter.tscn","DodgeChance":10,"Energy":100,"HP":110,"Potions":4,"SleepChance":5,"Speed":2,"_AttackPower":10,"_BossHP":80,"_DodgeChance":10,"_Energy":100,"_HP":89,"_Speed":2,"fv":151.5},
"enemy" : {"UpgradeIcon":"res://Upgrades/SandmansBlackjackIcon.tscn"},
"icon" : {"AttackPower":7,"DodgeChance":20,"HP":100,"Speed":1.4,"_DodgeChance":20,"_HP":80}
}
or
[
{"AttackPower":10,"Boss":"res://Bosses/SkeletalArcher.tscn","Character":"res://Characters/PitFighter.tscn","DodgeChance":10,"Energy":100,"HP":110,"Potions":4,"SleepChance":5,"Speed":2,"_AttackPower":10,"_BossHP":80,"_DodgeChance":10,"_Energy":100,"_HP":89,"_Speed":2,"fv":151.5},
{"UpgradeIcon":"res://Upgrades/SandmansBlackjackIcon.tscn"},
{"AttackPower":7,"DodgeChance":20,"HP":100,"Speed":1.4,"_DodgeChance":20,"_HP":80}]