He is voiced by Tomokazu Sugita in the Japanese version of the anime, and by Kyle Hebert in the English version of the anime.
Currently Escanor's appearance is largely the same as his appearance in Vampires of Edinburgh, with the addition of a mustache and pair of glasses. Escanor's attire is a suit commonly worn by bartenders and although slightly baggy, does appear to fit his non-sunshine form far better than his previous attire. He temporarily wore spectacles during his first formal appearance in the plot.
Ten years ago, he wore a suit of full body armor with a unique helm (which may be too large to fit him properly in the early morning or night, and conversely too small to fit him during the sunlight hours, particularly noon).
Escanor was revealed during the Vampires of Edinburgh side story to be a very meek and weak looking young man, with short-cut hair and a set of clothes that seemed too large to fit him. His clothes were made to be intentionally loose so that they fit him properly.
In the wanted poster, Escanor is depicted as a middle-aged man with a beard and a ponytail hairstyle.
His lion symbol is on his back.
Escanor's personality changes drastically along with his strength between day and night. At night, he is skiddish, submissive and unfailingly polite. Whereas in the day he is arrogant, boastful, and domineering, he also takes it upon himself to deliver judgement to those he feels have sinned, such as those that toy with feelings. Both personalities seem to be truly him and he remembers everything he does in either, though at night he has chastised himself for losing control during the day.
Despite the great contrast, there are some personality traits he retains day or night, such as his feelings for Merlin and fondness for writing poetry. Even with his prideful personality he still cares for his comrades, but in his own way. Pretending to annihilate Gowther, and instead attacking the two Commandments for toying with people's hearts. But at night he cares very deeply for his captain and comrades, not wishing to harm any, even those he only recently met.
Escanor also doesn't particularly desire anything, as when competing in a tournament for any prize he desires, he simply stated he would like to deliver alcohol for that tournament and not compete, despite his power.
He is also accustomed to others calling him a monster for his unique body changes after suffering a bad childhood when his power first manifested. Even the likes of demons refuse to believe he is a human.
During the day Escanor's pride and attitude is such that he never holds hatred in his heart to anyone, even Demons, as he doesn't hold hatred to those beneath him, he only pities them. This quirk has given him immunity to a Commandment. His pride is also unfailing as when his own blow got reflected to him with greater power, he isn't surprised he got injured by his own attacks.