The older brother of Cory, Morgan, and Joshua Matthews, Eric began the show as a suave, popular young man who constantly went on dates. He was originally portrayed as the stereotypical older brother. Eric's character changed mid-series from preppy older brother to "crazy, moronic brother." During the fourth season, Eric takes a year off from school when he doesn't get into a college of his choice.

Eric also often plays off his hero and mentor, Mr. Feeny. Though Eric and Feeny are not originally seen as having a close relationship, the two develop a bond, that at least in Eric's mind, is one of love. This culminates at the end of the fifth season when Eric sings a rousing rendition of "To Sir, With Love" at Cory's High School Graduation. Eric also coins the "Feeny call" and even makes a talking doll for Feeny that does the call so Feeny will not miss him when he moves to New York with Cory, Topanga, and Shawn.

Eric is actually highly intelligent, and Feeny mentions that Eric can get passing grades in his sleep (in fact, he once did). He compares this to Cory who, though lacking Eric's natural intelligence, makes up for it by being hard-working when he wants to be, and thus succeeds. Eric, on the other hand, is too lazy and immature to be anything but a ridiculous goof-off, to the annoyance of both his family and Feeny.

During the later years, storylines involving Eric became stranger and wackier, often bending the rules of reality itself, such as an episode where Eric continually tries to sneak up on Topanga by using many disguises and crazy situations. The change from a girl-crazy cool-conscious teenager (the first half of the series) to a scatter-brained odd-ball (the second half of the series) was a drastic change. Eric often provides comic relief in tough situations throughout the series.

Shawn Patrick Hunter (Rider Strong)

He was born in Ohio and lived in Oklahoma for a while as a child. He had been in 5 different schools before he was 12. Shawn has always been the best friend of Cory Matthews. The two met when Cory fell into an animal pen at a zoo and Shawn came to his rescue. Shawn has a personality almost opposite of Cory's. Shawn takes more risks and has more of a bad boy image. Their personality differences do cause problems between the two a few times, but these problems can never destroy the friendship between Cory and Shawn. Later seasons depict the relationship between Cory and Shawn as being so intimate that Topanga is jealous of it. Several innuendos are made as to the subconscious homoerotic nature of their friendship.

In the first season of Boy Meets World, not much is known about Shawn Hunter except that he is Cory's best friend. In season two and thereafter, the show began to focus on Shawn's life as well. In the beginning, Shawn lives with both his parents, Chet and Verna Hunter. One day, Verna runs off with the trailer and Shawn is left under the care of the Matthews family when Chet chases after his wife. When the Matthews find that Chet will not be returning for a while, Jonathan Turner, a teacher at John Adams High School, offers to be Shawn's legal guardian. About a year later, Chet comes back and eventually Verna rejoins her family temporarily before taking off again. Shawn goes through many issues, including joining a cult briefly. In a later season, Shawn's half-brother Jack arrives in town for college. Shawn moves in with him and Eric Matthews, Cory's older brother, which leaves Chet free to take off again. However, on a trip back to town, Chet dies of a heart attack. Towards the final episodes of the series, Shawn discovers that Verna wasn't his biological mother when she sends him a letter after Chet's death. Apparently, Chet was left to take care of Shawn after his biological mother, who was actually a stripper, died shortly after his birth.

Shawn is a ladies' man, something Cory sometimes is envious of. Conversely, however, Shawn is jealous of Cory's close, long-term relationship with Topanga. Later in the series, Shawn falls in love with a girl named Angela. They have a tempestuous relationship, but genuinely care for each other. Things get rocky when his best friend Cory breaks up with Topanga. At the end of the series, Shawn moves to New York with Cory, Topanga, and Eric.

Topanga is Cory's main love interest. Her character underwent dramatic changes during the course of the series. When she was initially introduced in the first season, first as a guest character and later recurring, she was a hippie vegetarian and somewhat of an outcast, sitting at the table with the other "weird kids." However, once the characters entered high school (and Danielle Fishel became a main character), she became more of a "regular teenage girl," and her beliefs about the environment and other topics were less emphasized. Much was now made of the fact that Topanga was attractive, popular, and academically successful. She also cut her trademark long hair in an episode in season 4. She grows distant from her parents, whom she once was very close to; by the fourth season, her parents force her to move to Pittsburgh, and she runs away from them, back to Philadelphia.

Also starting in high school, her on-again/off-again relationship with Cory became one of the major elements of the show. Their relationship seems to mirror traditional high school sweethearts, dealing with normal boyfriend/girlfriend problems. However, this only continues up to "A Long Walk to Pittsburgh," when the show starts to depict them as star-crossed lovers. The series tries to justify this by saying that Cory and Topanga first met as toddlers and became best friends, only to be driven apart as they grew older and Eric pressured Cory to think of girls as "icky." However, this seems to contradict first season episodes which show that Cory knows almost nothing about Topanga.

Although Topanga was admitted to Yale University, she decided to attend Pennbrook College with Cory and their friends and proposed to Cory at their high school graduation. They married before their sophomore year (during the final season), after which the show attempts to put them in stereotypical marriage problem situations. At the end of the series, she and Cory move to New York with Eric and Shawn.

Throughout the series, George tries his best to guide young Cory, Shawn, and their friends as they encounter problems in their lives on their road to adulthood. He first appears on the show as their school teacher, principal, and neighbor, and eventually toward the later years, their college professor (teaching such diverse courses as archaeology, English literature, and quantum physics). Cory mentions more than once that Feeny is the only teacher he has ever had since kindergarten. Later on in the show, George Feeny becomes the mentor of Eric Matthews. George Feeny is a Boston native and enjoys gardening. He delivers the final line of the series finale, directed to an empty classroom just vacated by his students: "I love you all. Class dismissed."

Mr. Feeny was once married to a woman named Lillian, who died before the series began. He later marries Dean Lila Bolander (played by William Daniels' real-life wife Bonnie Bartlett).

Alan is the husband of Amy Matthews and the father of Eric, Cory, Morgan, and Joshua. Alan, as the father of the Matthews children, provides guidance to his children. He has a quick temper, though when it shows up, usually through consultation with his wife, he often apologizes afterwards for words spoken in anger. In some later episodes, Alan does not support Eric in all of his ventures, and Amy in turn tells Alan that his coddling of Eric is the reason Eric has turned out the way he is.

He began his career as a supermarket manager at the Market Giant, eventually winning a prized "Grocie" award. Eventually, he becomes disillusioned with his standard 9-5 job that he had worked for so many years, and quits without discussing it with his family. A brief period of family distress follows, with Amy proclaiming that she will in turn "make a large decision that affects the entire family without consulting with him first." Accordingly, she purchases a sporting goods and outdoor supply store that is up for sale, which Alan takes over and renames "Matthews & Sons."

Amy is the wife of Alan Matthews and the mother of Eric, Cory, Morgan, and Joshua Matthews. During the earlier years of the show, Amy was a real estate agent and eventually became an art gallery worker toward the end of the show.

Amy often plays counterpoint to Alan in giving their children discipline and guidance. In dealing with Eric, she always discourages "babying" him, whereas several episodes involving Cory see a much more gentle and motherly Amy.

Eli Williams was another teacher to Cory, Shawn, and Topanga. He joined the show in season three when his best friend and former college roommate Jonathan Turner got him a job at the school, teaching media arts. Like Turner, Williams is considered "hip and cool," and can relate easily to the young students. However, being a former journalist at a television station in Philadelphia, he sometimes finds teaching and reaching out to students to be a difficult chore, something that Turner helps him out with. Stories in the third season were written to focus on the friendship between Turner and Williams and the single bachelor life of dating, partying, and socializing that they experience outside of their teaching, showing the life of young adults post-college. Williams had a starring role for some of the third season before he disappeared with no explanation.

In the DVD commentaries, Michael Jacobs and some of the actors discuss the network pressure during seasons 2 and 3 to bring more young adult characters to the cast. Eli Williams strongly reflects this trend.