Combat cooperation repeatedly reinforces their romantic bond and makes them the central tactical partnership of the series.
They fight the Gleam Eyes together, rescue Thinker together, confront the final SAO battle together, and later cooperate in New Aincrad and the Underw...
They are dependable members of the same combat network centered on Kirito's allies.
Asuna and Klein fight together against the Gleam Eyes and later participate in the Excalibur mission with the same wider group.
Asuna and Silica belong to the same supportive circle of players and survivors.
Silica is included among Asuna's friends during later ALO activities and joins the Excalibur mission alongside her.
Agil is a practical ally within Asuna's extended survivor community.
Agil provides information relevant to Asuna's confinement and later supports the group during ALO missions involving New Aincrad.
Their relationship is based on shared battles and membership in the same survivor community.
Klein fights beside Asuna during the Gleam Eyes crisis and later joins missions in which Asuna is a central leader.
Their connection is thematic and geographic rather than based on a recorded direct meeting.
Asuna later enters the Underworld, while Selka is established earlier as part of the Underworld's Human Territory community.
Explore the full interactive character relationship map of Sword Art Online
Related entry on Wikidata (Q18934600), public domain (CC0).