Demetrius – in love with Hermia at first but later loves Helena
Oberon – Titania's husband and King of the Fairies
Titania – Oberon's wife and Queen of the Fairies
Robin Goodfellow/Puck – servant to Oberon
Peaseblossom – fairy servant to Titania
Cobweb – fairy servant to Titania
Moth – fairy servant to Titania
Mustardseed – fairy servant to Titania
First Fairy
Second Fairy
The Indian Changeling Boy - servant to Titania
The mechanicals
A guide to their names.
Peter Quince – carpenter, leads the troupe and plays Prologue
Nick Bottom – weaver, plays Pyramus
Francis Flute – bellows-mender, plays Thisbe
Courtesy of Folger Library. 
 The “rude mechanicals” (rude as in rustic or unsophisticated) in  A Midsummer Night’s Dream  are the troupe of actors who present a play for Theseus and Hippolyta.
A Midsummer Nights Dream Characters of the Play