The White Wolf Kido Senshi Gandamu Eiji : Season 1 Episode 4

Federation ace pilot Woolf Enneacle wakes up from healing sleep aboard the Diva. He tries to claim the Gundam for himself to Flit's chagrin, and decides to have a mock battle to determine who should pilot the mobile suit. However, during the mock battle, the two of them are suddenly attacked by the UE, and end up making a startling discovery about how the UE are able to remain hidden.