In what direction does D.VA eject from her Mecha?

According to these two sites, Icy Veins and Furious Paul, players can control the direction of ejection by using the movement keys. The default direction is backwards.

This matches with my own experiences.

From Furious Paul's D.Va Overwatch guide:

Steer D.va's Ejection

When your mech gets destroyed, you can hold down the direction you want D.va to eject out at and she will jump out that direction. This means you can hold your strafe, forward, and backward keys down while getting ejected and she will pop out that direction. By default, if you don't press any movement keys, D.va will eject backwards away from her mech.

I play a lot of D.Va and can confirm that I try to eject in the direction that will put the mech in between me and enemies and/or get me closest to cover.