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Alexis Leskinen (アレクシス・レスキネン?) is a professor and chief researcher of the Brain Institute at Viktor Chondria University, the mentor of Maho Hiyajo and Kurisu Makise, one of the minds behind project Amadeus and an agent from Strategic Focus.

Leskinen is one of the main antagonists of Steins;Gate 0.

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An outgoing, imposing but very kind man, Dr. Leskinen is both a respected scientist and a childish man, showing an optimistic behavior and a fondness for jokes.

However, as an agent from Strategic Focus, he secretly works seeking information on time travel and testing Amadeus' potential as military weaponry.

When it comes to acting as a scientist, Leskinen is ruthless, having no hesitation against human experimentation, and even recurring to torture and brain-washing to get the information he needs. As Rintaro Okabe describes him, he is a true "mad scientist".


Leskinen is the mentor of Maho and Kurisu at the Victor Chondria University in the United States. In Steins;Gate 0 in the β (Beta) timeline, he brought Maho to Japan to assist him in his lectures about the Amadeus system. He speaks English in his lectures while Maho translates his words to Japanese, although he is shown to be able to converse in Japanese using a translator device.