Doctor Henrik von Schneeplestein, known commonly as Dr. Schneeplestein

Dr. Schneeplestein was created by Sean and first appeared in 2016 on the Jacksepticeye channel. He is a doctor, although his license is questionable, and he doesn't know basic human anatomy. Regardless, he's prideful in his work and holds an optimistic and energetic attitude. 

—Schneeplestein's birthday is September 15th.

—The phone number for his workplace is 1890-485-6239-5946-4659-8321.

—There is a rumor that he never actually earned his medical license, instead obtaining it from a cereal box.

—Dr. Schneeplestein has mentioned having a wife and children, but given how little he interacts with them, there's an implication that the relationship is bitter. (He's remarked how his wife would rather stay with her tennis instructor and he won't be able to see their kids if he's bad at his job)

—In Jacksepticeye's April 2019 charity livestream, Sean posted a poll as to who the best ego was. He didn't include Anti, as he knew he would be the overwhelmingly popular choice (and due to poll restrictions), and so Dr. Schneeplestein won the poll.

For the most part, Dr. Schneeplestein is an optimistic ego and is used to adapting to his situation. He's also very independent and puts on a confident attitude while he works. It may not always be warranted, however.

Dr. Schneeplestein doesn't like to use conventional methods for healing his patients; hell, most times he forgoes reading the instructions and instead just jumps in head first into operations. We've noticed his best work seems to be when he is speaking to someone else. Usually either the viewers of the video he's in or to the patients themselves even when they're under anesthesia. (He also acts like they reply, despite them being unconscious). The doctor is passionate about healing people, but part of that is due to his relationship with his family.

As mentioned earlier, Dr. Schneeplestein's relationship with his wife and kids... isn't exactly the best. He only has bitter things to say about his wife, who we don't know the name of, and has remarked that she'll let him see their kids just so long as Schneeplestein is good at his job. And when he isn't good at his job is where we start to see a different side of this ego. When he fails to save someone, he gets irritable and has admitted, when he failed to save a patient, that no one loves him.

He also gets very cranky when he doesn't have his morning coffee. When he's gone too long without it, Dr. Schneeplestein will tend to threaten his patients. Most of those threats are to leave them in medically induced comas, or even to let them die. As far as we know, he has not currently made good on any of those threats. At least, not in the real world, and not of his own free will.

Well, yes.

Dr. Schneeplestein is a doctor without an official medical license and without proper medical training. He has no regard for conventional methods that are safe and proven to work, instead using his own improvised tricks to operate on patients.

Those methods are not authorized and not used by certified doctors, given that Schneeplestein's methods are much more likely to kill patients.

Combined with how irritable he can become due to failure or going without coffee for too long, he can definitely be considered dangerous, as he's much more likely to allow his patients to die. If you meet him, make sure he doesn't have to wait for his coffee.