Looks more like Michel's confirmation with the cross and the priest.
Correct. This is indeed the first communion of Prince Michael of Greece in Malaga. Prince Michel who wrote the text of "My family album" by the Count of Paris, describes the picture thus: "The Count of Paris has escaped from Pamplona to come to Malaga, where his sister Princess Christopher of Greece, was temporarily installed. He attended the first communion of his nephew, who was held at the Augustinian convent.