E-119 Upsilon was an E-100 Series robot.
Upsilon was the twentieth E-Series robot created by Dr. Eggman. At some point it was sent to the Battle Fortress to meet with the Battle Bird Armada, but it was attacked by E-102 Gamma and its Mobini freed. (ASUB)
- Upsilon was never formally introduced in the comics, but his fate was revealed in the (now defunct) Sonic Universe blogs.