Ifeachor is a Nigerian born in Plymouth, Devon England where she attended Plymouth College Preparatory school followed by the Eggbuckland Community College also in Plymouth. Ifeachor attended The Raleigh School of & drama under the tutorship of Norma Blake and the Deborah Bond Dance academy where she enjoyed the ISTD syllabus in tap, ballet, modern and Jazz. After completing her A-levels Ifeachor used her gap year to audition for London drama schools and gained a scholarship to The Webber Douglas Academy in London.
After graduating from the now merged Central School of Speech and Drama in July 2007 Ifeachor shot her first feature film ‘Blooded’ directed by Sundance film festival winner Ed Boase and appeared in two commercials. Ifeachor then went on to make her theatre debut as 'Minerva' in the Royal Shakespeare Companys production of Noughts & Crosses directed and adapted by Dominic Cooke. It was from here she made her television debut as Leila in "No Going Back" episode of BBC1’s Casualty which aired in January 2009.
Ifeachor went on to play Rosalind in Tim Supple’s As You Like It for the opening of the new Curve Theatre in Leicester. Whilst rehearsing Ifeachor was offered the role of Abigail Naismith in David Tennant’s final two Doctor Who episodes ("The End Of Time" Parts One and Two) which were broadcast Christmas 2009 and New Years Day 2010. She played daughter of the billionaire Joshua Naismith (David Harewood) who wanted his daughter to have immortality and live forever.
Ifeachor played the role of Beneatha in Lorraine Hansberry’s A Raisin In The Sun directed by Michael Buffong for the Royal Exchange Theatre in Manchester which opened to rave reviews. She also played Ismene at The National Theatre in the premiere of Moira Buffini's play Welcome to Thebes, directed by Richard Eyre from 15 June to September 2010.
Ifeachor's radio work includes the role of Queenie in the 2011 BBC Radio 4 Classic Serial production of Edna Ferber's Show Boat.