What Helen's Romanov cousins thought of her?Did they have the same opinion as of her mother or she just "wasn't that grand" to be the gossip center?
The children of Alexander III (read - children of Empress MF) were not close to the Vladimirovitchi brood due the rivalry between their mothers. So they thought all offsprings of Vladimir and Maria Pavlovna were too arrogant and super-imperial in manners and views of life. GDss Xenia Alexandrovna considered Elena too much haughty and unfriendly (that's quite understandable with such imperial Maman as GDss Maria P.-elder).
The children of GD Pavel, I mean GDss Maria P.-younger and GD Dmitriy, seemed neutral to Elena, I've not read anywhere about any ill-feelings.
If speaking about children of GDss Maria Alexandrovna, Duchess of Coburg, then only Victroria Melita was more or less on friendly terms with Elena (after all she loved her brother Kirill), though in later years (after the 1917 Revolution) they definitely drifted apart.