Aldebaran (アルデバラン), commonly known as Al (アル), is Priscilla Barielle's knight, and just like Subaru, he is a normal person that has been summoned from Japan.
Powers and Stats
Tier: Likely 8-B
Age: Around 36-37
Classification: Human, knight
Attack Potency: Likely City Block level (Stated to be a upper mid tier, pretty much all mid tiers are city block level)
Speed: Likely Supersonic+ (He should at least be supersonic+ as a upper mid tier)
Lifting Strength: Likely Superhuman
Striking Strength: Likely City Block Class
Durability: Likely City Block level
Range: Several meters
Standard Equipment: A sword
Intelligence: Skilled combatant
Weaknesses: None notable
Unknown Ability: Al has an ability which allows him to repeat a certain amount of time over and over again with other people being unaware to its effects, though sometimes his opponent can tell if he's returned, and he himself refers to it as a bet. He has used this ability to evade and test Capella's blood multiple times to make sure he wouldn't get infected just by stepping in it and she noted that she didn't see him evading it at all. Al can only negate his or others' injuries or deaths while his ability is active, in addition to only working within a limited area, which he refers to as territory.
Earth Magic: Al has been shown to be able to use Earth Magic.