A romance with Liara can be continued or started in Mass Effect 3 by both a male or female Shepard. Although many of the core scenes regarding their relationship stay the same, there are more moments between the pair if continuing a relationship with Liara in Mass Effect: Legendary Edition.
Those continuing a romance with Liara from Mass Effect 2 will take her hand when reunited with her. Shepard also gets the opportunity to tell her they missed her and reassure Liara with a caress on the cheek by picking "I remember the ones I love" after watching some troubling footage on Mars.
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Once back on the Normandy, Shepard can speak with Liara in the room behind Doctor Chakwas' med bay about their relationship if they were with her previously in Mass Effect: Legendary Edition
If players continued their romance with Liara from Mass Effect 1 in the Shadow Broker mission of ME2, she will mention their night on the Normandy. Pick "Absolutely" to continue a relationship with her in ME3. Or, choose Liara if she mentions Shepard having feelings for another character.
Keep an eye on Shepard's personal terminal while progressing through the campaign for the message entitled "Getting away from work." This is from Liara, who is inviting Shepard to spend time with her on Mass Effect's Citadel.
After finding her on the Presidium, pick "I want more than just friends" when it appears for Shepard to kiss and tell Liara they want to spend their life with her. If Shepard has not previously romanced Liara, pick "Or more than friends" instead to start a relationship.
Keep checking in with Liara on the Normandy after missions, and at some point another small romantic moment between the two will occur. Liara
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