This article contains cast and character information for the ABS-CBN Philippine action drama television soap opera Minsan Lang Kita Iibigin.
2nd Lt. Alexander "Xander" S. Del Tierro (Coco Martin) He comes from a prominent family with a strong military background. He has a domineering grandfather who is one of the country's feared generals, a manipulative mother solely devoted to pleasing her father, her husband but not her own son, and a father who is a respected military officer and the only one who truly understands him. He has consistently refused to join the military academy, but one major mistake made him decide otherwise. He graduates with honors from the academy; despite this achievement, Alexander feels empty. His duty took him to the mountains and it is there that he began to fill the void in his heart where he finds Javier, his twin brother. He falls in love with a rebel, Kaye who was Javier's former girlfriend, their relationship got easier as she decides to take amnesty and turn her back from her principle.
In Season 2, Alexander decides to be based in Manila to become closer to his family, particularly his brother. Upon the decision of the Chief of Staff, he spearheaded the investigation of carnapping incidents and suspects that Javier has been involved, even though he thought right, he failed to prove it from the evidences he has gathered. This leads Javier thinking that his family can revolve around him instead. Alexander experiences Lover's Quarrel with Krista and apologises many times, he soon tries to fix things by asking her to marry him for which Kaye refuses. As his auntie is freed from prison, he sees his affection for his brother and asks her if she could treat him like a son like his brother. Finally after months and trials of proposing to Kaye she reconciles and agrees to marry him. Alexander and his family visits Kaye's house to meet and get to know each other. Meanwhile, he finally confronts his brother of all his wrongdoings, his jealousy and immaturity after he saw his auntie (birth mother) Lora crying after she had a conversation with Javier. As Javier runs away from the police, he and Gabrielle were assigned to work with the police to help capture his brother. Days after he is informed that Javier is roaming around a street near their house. He runs for Javier and ends up getting hit by his brother. He comes back being a whole different person after the attack. In Minsan May Impostor it is revealed that Javier is impersonating him and the real Alexander is hidden in an abandoned warehouse far from Manila in the forest. Before his twin leaves, Javier took an Iron Mask and wore it on his brother (a parody of The Man in the Iron Mask). Javier visits him again and gives him food, Alexander asks him to set him free but refuses to and tightens the mask and rope he is wearing. Meanwhile, he manages to untie the ropes until Javier comes in and pretends that he hasn't find a way to escape. He later takes the rope off and kick Javier and escapes but is unfortunately hit by Alondra and loses consciousness. Alondra and Javier immediately pulls him back and ties him up and drives away before he wakes up. He later hears Gabrielle and sees her in pain and finds that her best friend has been stabbed. He crawls to her and sees Gabrielle passing away in front of him and cries for help. At night he finds a person dragging Gabrielle's body away, suspecting that it was Javier who really was Mimi but refused to talk. Finally, Alexander finds a way to escape and breaks the padlocks and mask but is still locked inside. Javier visits him and fortunately he wins this fight and retains his name and uniform back and yearns revenge for Gabrielle's death suspecting that it is Javier's fault. He ties Javier up while he is still unconscious and in a reversal of events, he locks Javier up in the cage. He comes back to the military camp and decides not to say anything about Javier's case and that he saw Gabrielle dying in front of him. He runs for Krista and begs her not to leave; he tells her about Javier capturing him after trying so hard not to tell anyone else as it would be dangerous and would be harder to find who killed Gabrielle. He later suspects that his mother Alondra is working with Javier and can be a possible suspect concerning Gabrielle's murder. Alondra's acquaintance with Javier is later proven when he sees his mother and congratulates him for portraying Alexander so well. After finding Gabrielle's body, he checks on Javier and finds that he has escaped but someone has helped him suspecting that it is Alondra, being the only one who has kept connection with him. In Gabrielle's funeral he shares his experiences with her being his best friend and being the one by his side in laughter and sorrow, in sadness and happiness she never left his side and cares more for others and their happiness instead of hers. Alexander shares that Gabrielle is one of the person that gives all her love. That she might not be perfect as a person but is at being a friend and finishes off saying that he loves her and is ready to sacrifice himself for her. With his grandfather being furious, he speaks up and tells what he and Krista has heard concerning Diego, Ibon and Tiago's plans, being the three responsible for the attack causing Remedios' death and is still planning to kill Javier. He also informs that it wasn't him that Gabrielle was following before she died but was Javier and that he impersonated him while he was unconscious and locked up in a cage. Alexander tells them that it was Javier who broke up with Krista and courted Gabrielle and kissed her but is sure that he wasn't part of Gabrielle's death as he is in love with her. He also shares that they've kept Javier in the cage but he has escaped and says that he has only one suspicion on who helped Javier and that is Alondra. After finding out that Mimi and Tomas are related, he brought into conclusion of the possibility that Alondra might've taken him from Lora and that Lora is his real mother, he takes a DNA sample and is meanwhile proven that Lora is in fact his mother. He unites with Lora and promises her that they would never part and would love her as a son, the way Lora never felt and also clears up the questions in his mind of why he never felt Alondra's affection. Alondra blames him for what is happening to her with the people she loves leaving her and that it is all his fault, Alexander tells him that it is her fault and that he stole his life but assures Alondra that he would never insult her because he still respects and loves her but Alondra tells him that she doesn't need his affection. Alexander finds out that Tomas has escaped and is sure that he is going to Lora. With all the military surrounding their house, he orders one of them to check on his mother. They discover that Lora has gone missing and immediately searches for her with the help Berto. He drops off Berto and goes back to the warehouse where Alondra has kept Lora as of right now. Lora meanwhile escapes and hears a gunshot and finds Javier and a bloody Alondra. He immediately calls for back up and a medical group for Alondra but is hit by Javier but immediately stands up and runs after his brother and asks him to surrender. They find out that the rebels have Alondra and despite all the things she's done to him, he agrees to help her and pretend to be Javier to save her because she is still family. He comes to the building and sees Alondra covered with bombs and fails to rescue her. Alexander apologises to her for failing to stop the bombs from exploding though Alondra asks for forgiveness to him after all these years before she died. A year after, he celebrates his wedding with Krista and are now happy parents of twin brothers.