@Kingster , Demon Fusion is cut off for now. Not entirely. Also, that vote is suitable. I'll explain each of your stats.
STR is Strength, which basically measure your striking/lifting strength. The more Strength you have, the more damage Physical moves and your normal strikes deal.
DEX is Dexterity, which is a handy way of measuring one's skill with their hands. A higher DEX will make ranged weapons and skills more effective.
END is Endurance, and that is your health/status ailment resistance. More END means more HP.
AGL is Agility, which is your speed. This determines your dodge chance, turn in battle, and how quickly you can move.
INT is Intelligence, any it can be summed up as your Magic stat. Not only will you have more MP, but your magic will deal more damage. Inversely, it will make healing skills heal for more.
CHR is Charisma, and it doesn't have a direct use in battle. This doesn't mean it's completely useless. You may be able to sway others to your side, or gloss over a mistake in negotiations.
LUK is Luck. More luck means more critical hits, and it can protect you from instant death skills.
If anyone needs more elaboration, please reach out to me. I'd be happy to help.