Zaafin

Zaafin was the wife of Senokir.

Background
Zaafin toiled in the Abundant Terrace in Vasselheim as a girl. At some point she married Senokir. Years before 811 PD, when Senokir met Vox Machina, Zaafin died, and he held onto her ashes, intending to make the trip to bury them.

and
Senokir asked Vox Machina to bury Zaafin's ashes under the Birthheart in the Abundant Terrace. Pike was suspicious, and the party checked the box for any undead presence or enchantments, but they were reassured that anything untoward would be removed and they followed through with the interment.

Trivia
Ashley Johnson, who played Pike, remained suspicious about the box through the end of the campaign. In the Talks Machina Campaign Wrap Up, Matthew Mercer revealed that there was nothing sinister about the box. Senokir had been perfectly honest: it really was just Zaafin's ashes.