You can purchase a Rapid Airport e-Ticket for one person. The reserved seat fee is covered by the e-ticket and you can pay the remaining fare by tapping Welcome Suica Mobile at the ticket gate to board your reserved seat without a physical ticket.
Book an Express Train e-ticket
Tap your Welcome Suica Mobile at the ticket gate
*The basic fare will be deducted from your Welcome Suica Mobile balance.
Board and take your reserved seat
*You can check seat information using the Wallet app.