She first appeared on December 17, 1980, her name was first mentioned a day later. Arlene regularly appeared in the strip in the 1980s, but has been shown less often since then.
Arlene is Garfield's on-and-off girlfriend who can successfully crack jokes at the expense of Garfield regularly. She is a slim, sleek, long-tailed, pink-furred cat, with a narrow neck and big red lips, which seems to be the only one of its kind living in the world. Earlier in the strip run, she also had a big gap between her two front teeth. In the cartoon, she has three fingers (including thumb) as Odie, but in CGI movies & The Garfield Show, she has four fingers. Since 2007, Garfield and Arlene's relationship has become a bit more serious than before.
Lastest appearance in the strip: February 11, 2016.
Images with Arlene can be seen here.