Anyway! I'm thinking to avoid any explicit references to a rival goddess for now. If divided loyalties between the isekai goddess and pre-memory Helen's divine patron do arise, I feel like they'll be easier to handle (for Senaz!) if she wasn't loyal to that authority in her old life as well.
[X] (PALADIN'S PAST) "... Helen Garland, Knight of the Conclave of Communion, formerly the greatest knights of the Galactic Republic - now, those of us who remain hope to help the Resistance defeat the Empire of Mankind and its dark Chancellor, the Id-Sorcerer Cleon Xanull." (A Star Wars pastiche; if influences from Helen's past life crop up here, things could get spacetastic.)
[X] (PALADIN'S PAST) "... Captain Helen Garland of the Transmission-Five, one of the spacefaring inter-civilizational Compact's ships under the Division of External Diplomacy, traveling the galaxy to meet new civilizations, discover new worlds, and sometimes handle other needs of the various governments that comprise the Compact. A pride of the Fleet, even with only half of the sixteen Duo Frames it's supposed to have! … Hope everyone else survived that encounter with the Tralbeast." (A Star Trek pastiche, except with mecha; influences would also lead to space, but also a heavily diplomacy-centered environment.)
[X] (PALADIN'S PAST) "... Captain Helen Garland of Heromiller Academy! Smooth with a sword and smoother with my words, I learned under great heroines and worked to save and improve lives across my world, protecting the innocent even from my own King." (Captain Garland herself was apparently a heroic musketeer sort; but Heromiller Academy… Well, that name seems off doesn't it? On the bright side, this one may warm up to Senaz faster.)
[X] (PALADIN'S PAST) "... Helen Garland of Earth, alternatively known as the solar superheroine, Sunray, member of the hero team Unity. Fought evil, did good, all of that." (From a comic-book superheroes Earth; used to saving days from supervillains more straightforwardly.)
And as for spell selection... I've gotta break with the current popular votes, on the basis of prioritizing stuff that actually uses our bonkers +6 primary spellcasting bonus. I'll keep Faerie Fire from the popular list, but add Healing Word (whose % difference from Cure Wounds is almost negligible at our level with a +6 bonus on it) and Dissonant Whispers (as a "just in case" get-off-me attack spell which will be hard to resist at DC 16). I'd also suggest Speak with Animals, because it expands the applicability of our superior social-fu. If anyone can successfully "persuade a beast to perform a small favor", it's our gal Senaz.
[X] 1st Spells
-[X] Faerie Fire
-[X] Speak with Animals
-[X] Healing Word
-[X] Dissonant Whispers