Dr. Becker

Dr. Becker was a cynical and disillusioned medic at the Eisler Memorial Hospital, who nevertheless acted as Tenma's confidante and closest friend at the hospital, despite their contrasting outlooks on life. He was rather wary of hospital politics, recognizing the situation at Eisler Memorial Hospital under the tenure of Udo Heinemann for the corrupt and unethical mess that it was, and impressed this upon the more idealistic Tenma.

(Source: Monster Wiki)