Arnout Gillain plays beach volleyball and competes in the federation “Deutscher Volleyball-Verband”.
Currently listed in DVV Mixed DBM-Zulassung Herren 2026 (rank 164, 4 points); DVV Mixed Herren 2026 (rank 170, 4 points); WVV Mixed 2026 (rank 2463, 0 points). 10 tournament results are documented since 2014, most of them in 2015 (4). Most recently documented: place 9 at offenen Mixed-Turniere der Landesverbände (Jun 4, 2026). The best tournament result is place 5 at offenen Mixed-Turniere der Landesverbände (Sep 7, 2025). Most frequent partners in the results: Denise Hinze (2×), Anika Wucherer, Moritz Engelmann.