In anime (and manga) there are often characters who exude an aura of power. Is there anything in the D&D 5th edition ruleset that would duplicate this effect?
The aura doesn’t necessarily need to do anything mechanically. The only requirement is that it must be visible under normal conditions (e.g. you don’t need to have darkvision, be under moonlight, have a special class ability or feat to see it).
If the aura can increase a character’s power, so much the better.