Aleksej is an extremely dark and manipulative person.
He is power-hungry and had created the Fold with merzost, in order to use it against his enemies.
He wants the Grisha to be free from slavery and oppression and planned to use the fold as leverage against those people who built the pyre (where they burn Grisha), and not only against his own enemies.
Aleksej As a Shadow Summoner, is able to summon and control darkness and shadows.
He can use the Cut, a lethal ability that uses sharp