When Katrina and the elder exchanged places, the Divine Beasts started having a hard time. An awakened White Specter which reached the Exalted God Realm is on whole other level than the old men they were fighting a while ago.
Furthermore, the matriarch was determined to dispose of the four Divine and permanently weaken the undead army. Sadly, just as she was about to attack them, she caught the sense of a very familiar person. Upon stretching her sense a bit further, she was shocked to see a bound Angelina, who was covered by Dark Magic and only her face could be sen, barely.
A pigolo was standing behind her daughter and staring right back at the matriarch with a fearless expression. He was certain of safety as long as Angelina is next to him. After all, Katrina wouldn't dare risk her daughter's life.