Sven flies the Blue Lion until he is injured, after which Princess Allura takes it. It forms Voltron’s lower right leg. The handover is the most consequential cast change the 1984 run makes, and it is forced by the Japanese footage rather than chosen by the American writers.
Blue Lion
Piloted by Sven, then Princess Allura. Forms the lower right leg of Voltron.
Notes
Pilot and combination details from the English Wikipedia list of Voltron characters; the Vehicle Team structure from the Wikipedia Voltron article.
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