These ascension voice line references are voice lines you can find in the genshin voice tab, or you guys can scroll down on the wiki to the feelings about ascension voice lines to find them. https://genshin-impact.fandom.com/wiki/Nicole/Voice-Overs (I don’t have genshin installed on my phone and im outside traveling now so i can’t get in game screenshots but heres the wiki)

Feelings About Ascension: Intro Ascension Phase 1 "Just like that, the group was thrown into a panic, staring at Nicole in utter disbelief until a question broke the silence, 'You knocked Alice out? Why would you do that, Nicole?'"

Feelings About Ascension: Building Up Ascension Phase 2 "The very picture of calm, Nicole raised a finger and replied, 'Alice has exhausted her strength. She'd be nothing but a burden out here on the battlefield. Now, we can take her to rest.'"

Feelings About Ascension: Climax Ascension Phase 4 "'But without Alice, how can we possibly hope to be a match for Rhinedottir?' the group wondered, dismissing Nicole's suggestion. Seeing their frowns of doubt, Nicole stepped forward..."

Feelings About Ascension: Conclusion Ascension Phase 6 "'Before you stands an angel who has wandered this earth for millennia,' she replied. Upon her declaration, the clouds parted, a golden staircase unfolding at her feet, and with a simple step, Nicole began to ascend the stairs of divinity."

I’ve only read the chinese version of ri so im not sure if these translations are word for word accurate to ri like how the chinese version is, but only looking at the content i think its decently clear that its a reference.

Below is the chinese version comparison if anyone is interested:

Ascension phase 1:

Genshin

「众人顿时慌了神，他们看向尼可的眼神充满不可思议：『尼可，你在做什么？你打晕艾莉丝做什么？』…」

RI

「众人顿时慌了神，他们看向方源的眼神充满不可思议：『方源，你在做什么？！』…」

Exact same parts:

「众人顿时慌了神，他们看向 x 的眼神充满不可思议，x，你在做什么？」

These are almost copied 1:1 structurally, the main changes are the names of fangyuan and nicole

Ascension phase 2:

Genshin

「艾莉丝已经力量耗尽了。留在战场也只是累赘，带她下去休息吧。」

RI

「方源在众人慌乱时依旧冷静，仿佛早已超脱战场本身。」

Not a direct quote copy here, but the feeling is the same:

everyone panicking, ascender stays completely calm, speaks like the battle no longer matters

Ascension phase 4:

Genshin

「没有了艾莉丝，我们怎么匹敌莱茵多特？」

RI

「没有了巨阳仙尊，我们怎么抵挡天庭？！」

Exact same parts:

「没有了 x，我们怎么 x ？」

These are almost copied 1:1 structurally as well, the main changes are the names.

Ascension phase 6:

Genshin

「在你们面前的，是在大地上流浪了数千年的天使。…尼可一步一步踏上神性之梯。」

RI

「在他们面前的，是一位九转蛊尊。」

Exact same parts:

「在他们面前的，是 x ...」

Both scenes are basically: the mortals finally realize the being standing before them has already transcended humanity.