Did they provide transportation to the Hilton? HND transportation tends to close down after 2 am (late night limo bus) and doesn't resume until 5 am (train). That's a long time to wait after such incidents. MK Taxi offers a flat rate
https://tokyomk.com/en/airport.html
7-11 has 24 hour locations & ATMs in HND terminal which would allow her to withdraw cash for food and transportation. Seven bank ATMs work with international accounts
https://www.sevenbank.co.jp/intlcard/index2.html