In the early chapters of the book, Mr. Hyde is described as a mysterious man who has some type of deformity. Mr. Utterson is very curious about Mr. Hyde especially since Dr. Jekyl has written his will with unusual instructions concerning his possessions and Mr. Hyde.
Through Mr. Utterson, the reader begins to wonder who Mr. Hyde is and what his relationship to Dr. Jekyll really is. Mr. Utterson goes to the door that Mr. Enfield saw Mr. Hyde enter, finally sees the approach of the man. He confronts him and is horrified by his appearance. He is deformed in a very disturbing way.
Mr. Hyde's appearance is hideous, he is frightening to look at. Mr. Utterson is very worried about Dr. Jekyll's relationship with Hyde, who engages in criminal, immoral behavior.
Hyde is a primitive version of Jekyl, he is connected to the well-mannered, sophisticated doctor, but only on the inside.
"Not all of these together could explain the ... unknown disgust, loathing and fear with which Mr. Utterson regarded him." In his final estimation, Hyde seemed "hardly human" and marked with "Satan's signature."