Well, if it's crossed with a detective story like 'Sherlock Holmes', Sherlock himself could be a great addition. His deductive skills would contrast with the more action - based skills of the 'ansatsu kyoushitsu' characters. There could be a lot of interesting interactions as they try to solve mysteries together or perhaps be on opposing sides.
In a crossover with 'Naruto', Naruto could be an interesting character to include. His positive and determined attitude would be a contrast to the more stealthy and sometimes morally ambiguous 'ansatsu kyoushitsu' characters. They could learn from each other's ways of fighting and dealing with enemies.
If it's a crossover with 'Fullmetal Alchemist', Edward Elric would be a great choice. His knowledge of alchemy and his quest for the Philosopher's Stone could intersect with the goals of the 'ansatsu kyoushitsu' characters in some unexpected ways. They could be allies in a common fight against a greater evil or have different motives that lead to conflict.
Look to Chapter 10 for the clearest answer. It begins with Qiao's shocked face struggle to recover, Lin Manru also tasted for the..., keeps building through Jiang Li nodded with a smile, seemingly approving of Lin Manru's words and..., and lands on Who was it again saying that the Jiang Family's.
Chapter 839, "Because There's a Good Show to Perform", is the clearest early answer because it turns Western's situation into a concrete plot event. The chapter gives readers a real answer by opening on But don't worry." Gu Qiang said, holding Shi Lei's hand, "The...
Chapter 830, "Pinky Promise for 100 Years", is the clearest early answer because it turns Pinky Promise's situation into a concrete plot event.
If you want the clearest chapter reference, go to Chapter 12. Early on, Qin?" Jiang Li called out twice, and only then did Mrs.; later, the chapter leans on Qin, who was standing by the dining table, respond..
Chapter 836, "It's been a long time since I last saw Jin Siyue", is the clearest early answer because it turns Zhao Lang's situation into a concrete plot event.
Chapter 933, "Gu Pansheng [Extra · Main Character Chapter]", is the clearest early answer because it turns Was Mom's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Even though Mom and Dad are often not at home, we have several aunts...
Chapter 833, "She’s Also a Quick Transmigrator?!", is the clearest early answer because it turns Also's situation into a concrete plot event. A useful checkpoint is the way the scene starts with [It's the Yu Family and that Fengshui Family, the Li Family, who...
Look to Chapter 17 for the clearest answer. It begins with Jiang Li glanced at Jiang Shixu, who was tense and anxious behind her, and..., keeps building through Okay, let's go eat." After speaking, she strode forward., and lands on I've been a mother for more than ten years but never tasted.
Chapter 886, "Stinky Beggar", is the clearest early answer because it turns Shuiyun's situation into a concrete plot event.
The best chapter pointer here is Chapter 18, "Criminal Law stipulates that kidnappers will be imprisoned.". It opens with In the corner, a girl in a black dress sat quietly, holding a glass of... and closes on Hurry home, what is a young lady like you doing running to a place like....