@Romi
May Day would be a good way to introduce them if we can't think of another way to do so. Ælfric would recognize at least some of the traditions from the
Þrimilci-monaþ customs from his own time, which actually where a lot of the May Day traditions in England come from.
Now, so far as ideas for maybe getting them to meet up before then, is Valli interested in historical European martial arts at all? Ælfric does teach a few courses regarding the fighting techniques from his time, specifically those from Northern Europe and England, which might be of interest given Valli's Scandinavian heritage.