what? where did you got that from?
green bar is not "fatigue", but TP (Technique Points), which allows you to use special attacks during battles.
During battle there is a green bar which is what you're thinking of, but outside of battle the bar between the health and blood meter, which is what was pictured in
randomguy6516265165's post is the fatigue bar. Try doing anything which makes you tired and you'll see the bar increase. Do anything which reduces your fatigue and you'll see the bar decrease.
thx guys last question Idk if I can get special weapons but from the ones I can buy the spear seems to be the best weapon right?
You unlock the ability to use the dual-wield weapons available in the shop later in the game, which you may want to upgrade to at the cost of being unable to use a shield with them, depending on your playstyle. At your point in the game the best options are either the sword or the spear, depending on if you value an extra point in either attack or attack speed. The bow and axe are also options if you want to go all-in on attack or attack speed at the cost of the other, but the two aforementioned weapons are generally recommended.
You'll also eventually unlock attack magic which is probably the best form of damage, but requires MP to use. There aren't any unique named weapons in the game (yet?), but I find the handful of relatively comparable options with varied stat tradeoffs more interesting than the alternative as it allow players to experiment and find what option best fits their playstyle, and not every player will be using the same loadout. However, it wouldn't surprise me if we could eventually upgrade our weapons or either find or create a special unique weapon that's far and away the best option.